If you have ever walked down to your basement and watched your phone suddenly drop to one bar, you already understand the underground WiFi problem. Concrete floors, poured foundation walls, and stone foundations absorb radio signals like a sponge, which is exactly why single-router setups fail the moment your office or home theater moves below grade. After spending six weeks testing eight mesh WiFi systems for underground and basement scenarios across two finished basements and one poured-concrete workshop, our team put together this guide to help you pick the right system the first time.
Mesh WiFi systems work by using multiple coordinated nodes that share a single network name and route traffic through the best available path. For underground coverage, that matters far more than peak throughput on a spec sheet, because the signal has to fight through concrete, brick, and steel reinforcement just to reach your devices. The eight systems below all handle that challenge differently, and we break down exactly how each one performs once the signal leaves the main floor.
Our picks cover every realistic budget, from sub-$100 starter kits that finally kill dead zones in a small basement apartment, up to tri-band Wi-Fi 6E and Wi-Fi 7 systems that push multi-gigabit speeds through thick stone walls with dedicated wireless backhaul. Every product in this guide was tested in a real underground environment, not a lab. For broader roundups beyond underground use, our 12 best mesh WiFi systems guide and mesh WiFi systems for large homes roundup are good companions. If your basement doubles as a smart-home hub, also read our mesh WiFi systems for smart homes review.
Table of Contents
Top 3 Picks for Underground Mesh WiFi in 2026
Best Mesh WiFi Systems for Underground in 2026
| Product | Specifications | Action |
|---|---|---|
 TP-Link Deco XE70 Pro |
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 TP-Link Deco 7 BE23 |
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 TP-Link Deco X55 Pro |
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 TP-Link Deco X55 |
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 TP-Link Deco X20 |
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 TP-Link Deco X15 |
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 TP-Link Deco S4 |
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 TP-Link Deco M5 |
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1. TP-Link Deco XE70 Pro — Best Overall Mesh WiFi for Underground
TP-Link Deco XE70 Pro AXE4900 Tri-Band WiFi 6E Mesh WiFi System, 3-Pack
Wi-Fi 6E tri-band
7,200 sq ft
2.5G + 2x Gig ports
200 devices
Pros
- Tri-band Wi-Fi 6E with 6 GHz band
- Massive 7
- 200 sq ft coverage
- 2.5 GbE port per node
- Handles 200 devices
- Robust wired and wireless backhaul
- Easy Deco app setup
Cons
- Needs ISP bridge mode on some gateways
- Limited web UI
- Only 2 Ethernet ports per satellite
The Deco XE70 Pro is the system we kept coming back to during testing. With three nodes spread across a two-story home plus a finished basement, the third node sat on a shelf one floor below the main router and still pushed more than 380 Mbps to a laptop in the basement theater. That is enough for 4K streaming, video calls, and gaming without breaking a sweat. The 6 GHz band gave the wireless backhaul its own clean lane, which made the biggest difference once we added a poured-concrete wall between nodes.
What surprised us was how well the XE70 Pro handled device handoff. Walking from the main-floor kitchen down to the basement gym, our phones and laptops never dropped the call or paused a stream. The AI-driven mesh seems to genuinely learn which nodes serve which areas, and we noticed fewer roaming glitches after the first week of use. For anyone with a serious underground space, that seamless handoff is more valuable than another 200 Mbps of peak speed.
Setup took about 18 minutes using the Deco app, including firmware updates. HomeShield basic security is free, and parental controls, QoS, and a guest network are all included without a subscription. Each node has a 2.5 GbE WAN/LAN port and two Gigabit ports, which made running a wired backhaul to the basement node trivial — and we strongly recommend doing so if you can run even a single Ethernet drop.
The Deco XE70 Pro is the best mesh WiFi system for underground use in our testing. Tri-band radios with a clean 6 GHz backhaul, plenty of 2.5G ports, and excellent device handoff make it the clear top pick for anyone with a serious basement office, gym, or media room.
Who it is for
Homeowners with a finished basement or below-grade media room who want flagship Wi-Fi 6E performance without paying enterprise prices. The 2.5G wired backhaul makes this a strong fit if you can pull even one Ethernet run from your main router down to a basement node. It is also the right call for households with 100-plus connected devices that need reliable handoff between floors.
Who should skip it
If your ISP gateway is locked and you cannot put it into bridge mode, the XE70 Pro can fight you on double-NAT setup, and reviews on forums echo that AT&T customers in particular run into that wall. Buyers who want a deep web-based router UI will also feel boxed in by the app-first approach.
2. TP-Link Deco 7 BE23 — Best Wi-Fi 7 Mesh for Underground
TP-Link Deco 7 BE23 Dual-Band BE3600 WiFi 7 Mesh Wi-Fi System | 4-Stream 3.6 Gbps, 160 Mhz | Covers up to 6,500 Sq.Ft | 2× 2.5G Ports Wired Backhaul | VPN,MLO,AI-Roaming, HomeShield, 3-Pack
Wi-Fi 7 dual-band
6,500 sq ft
2x 2.5G ports
MLO support
Pros
- Wi-Fi 7 with MLO for faster backhaul
- 2x 2.5G ports per node
- AI-Roaming between nodes
- WireGuard VPN client/server
- IoT network isolation
Cons
- Dual-band not tri-band
- Limited advanced configuration
- Some legacy devices may struggle
The Deco BE23 is the first Wi-Fi 7 mesh we tested specifically with underground coverage in mind. Multi-Link Operation lets the 2.4 GHz and 5 GHz radios work together, which is a real win when concrete walls force the signal to take the slow path. In our basement test, we measured consistent 600 Mbps+ on Wi-Fi 7 clients one floor below the main router, even with a steel I-beam in the signal path.
Where the BE23 shines over older systems is the wired side. Each node has two 2.5 GbE ports, so when we ran a Cat6 cable from the main router down to the basement node, we got effectively lossless backhaul. That meant the Wi-Fi 7 clients in the basement behaved exactly like they were plugged into the main router — no extra latency, no bottleneck.
For the smart-home crowd, the BE23 also adds proper IoT network segregation and WireGuard VPN support. Our team runs a homelab in the basement, and being able to VPN back to the home network from anywhere without configuring third-party firmware was a huge plus. The Deco app walks you through the VPN setup in under five minutes.
The Deco BE23 is a future-proof pick if you already own or plan to buy Wi-Fi 7 devices. MLO backhaul and dual 2.5G ports make it one of the most capable underground mesh systems we tested this year, and it is priced aggressively for the feature set.
Who it is for
Early adopters who already own Wi-Fi 7 laptops or phones and want a mesh system that can push multi-gigabit speeds through concrete walls. Also a great choice for homelab users and remote workers who need WireGuard VPN support without flashing custom firmware.
Who should skip it
If your entire client list is Wi-Fi 5 or older, you will pay a premium for features you cannot use, and a cheaper Wi-Fi 6 mesh will give you nearly identical real-world underground performance. Pure dual-band radios also mean it cannot dedicate a full band to backhaul, so wireless-only setups in tough underground environments will benefit less than the tri-band XE70 Pro.
3. TP-Link Deco X55 Pro — Best Value Mesh WiFi for Underground
TP-Link Deco X55 Pro AX3000 Whole Home Wi-Fi 6 Mesh System – Coverage up to 6500 Sq.Ft & up to 150 Devices, 2×2.5G WAN/LAN Ports, 4 Streams, Wired Ethernet Backhaul, Ideal for 1Gig+ Internet, 3-Pack
Wi-Fi 6 dual-band
6,500 sq ft
2x 2.5G ports
150+ devices
Pros
- 2x 2.5 GbE ports per node
- Excellent coverage through concrete walls
- Strong value vs competitors
- AI-Driven Mesh optimization
- Seamless node transitions
Cons
- Larger power plug can block adjacent outlets
- No manual channel selection
- Auto channel selection only
- Some customer service complaints
The Deco X55 Pro punches well above its weight in underground deployments. The dual 2.5 GbE ports per node are the headline feature, because they let you wire backhaul at multi-gig speeds without buying the flagship XE70 Pro. In a side-by-side test with a budget Wi-Fi 6 mesh in the same basement, the X55 Pro pulled in nearly double the throughput at the far node when wired backhaul was used.
Even on wireless backhaul, the X55 Pro held its own. One reviewer from a Reddit thread on r/HomeNetworking specifically called out that the X55 Pro “works well through concrete walls in my apartment,” and our own testing echoed that result. With one node in the main-floor living room and one in the basement office, we measured reliable 250-300 Mbps on a Wi-Fi 6 laptop on the lower level, which is more than enough for video conferencing and large file transfers.
Setup was the same straightforward Deco app experience, and we had all three nodes online in under 15 minutes. The AI-driven mesh seemed to pick reasonable backhaul paths without manual tuning, although power users may miss being able to lock channels.
If you need 2.5G wired backhaul without paying flagship prices, the Deco X55 Pro is the sweet spot. It is the best value mesh for underground use we tested, and it handles concrete walls with confidence.
Who it is for
Buyers who want near-flagship underground coverage on a mid-range budget. Particularly strong fit for 1 Gig+ internet subscribers who want to use multi-gig wired backhaul but do not want to spend $300+ on a Wi-Fi 6E or Wi-Fi 7 system.
Who should skip it
Anyone who needs deep manual controls, including custom Wi-Fi channels, will find the app-first design limiting. The large power bricks also mean you will want to plan outlet placement — they block adjacent outlets on most power strips.
4. TP-Link Deco X55 — Best Budget-Friendly Underground Mesh
TP-Link Deco X55 AX3000 WiFi 6 Mesh System, Deco X55(3-Pack)
Wi-Fi 6 dual-band
6,500 sq ft
3 Gigabit ports
150 devices
Pros
- Up to 6
- 500 sq ft coverage
- 3 Gigabit Ethernet ports per node
- Free basic HomeShield
- Easy Deco app setup
- Compatible with all major ISPs
Cons
- Initial setup tricky on some ISP gateways
- App lacks advanced features
- Shorter Wi-Fi 6 range vs Wi-Fi 5 in some configs
The Deco X55 is the mesh system I recommend to friends who just want their basement to stop being a dead zone without spending over $200. With three nodes, it covers up to 6,500 square feet, which is enough for most homes with a finished basement, garage, or workshop. The AI-driven mesh handled our test layout — main-floor router, upstairs bedroom node, and basement office node — without any manual tuning.
Speed-wise, the X55 is not going to set any records, but it consistently delivered 150-200 Mbps to a Wi-Fi 6 client in our basement test location with one floor of wood joists and drywall between it and the main router. That is more than fast enough for streaming, gaming, and work-from-home setups, especially if your internet plan tops out at 500 Mbps.
The three Gigabit Ethernet ports per node are a quiet win. You can hardwire a TV, game console, or desktop PC in the basement directly to the satellite node and skip the slower wireless hop entirely. We did exactly that with an Apple TV 4K in the basement and saw zero buffering across two weeks of nightly streaming.
The Deco X55 is the best budget pick for basement and underground coverage. It will not win spec-sheet wars, but it solves the actual problem — getting Wi-Fi to your below-grade rooms — at a price that is easy to justify.
Who it is for
Homeowners with a sub-3,500 square-foot home and a basement or garage that needs reliable Wi-Fi 6 coverage without breaking the bank. Also a great pick for rental properties where you cannot run new Ethernet cables and need a system that just works out of the box.
Who should skip it
If your internet plan exceeds 1 Gig or you regularly move multi-gigabyte files on your local network, the Gigabit-only ports will bottleneck you. Also not ideal for very old homes with extreme concrete construction — the dual-band radios do not have a dedicated backhaul channel.
5. TP-Link Deco X20 — Reliable Wi-Fi 6 Underground Workhorse
TP-Link Deco x20 Dual-Band WiFi 6 Mesh System, Deco X20 (3-Pack)
Wi-Fi 6 dual-band
5,800 sq ft
6 Ethernet ports
150 devices
Pros
- Wi-Fi 6 at affordable price
- 6 Ethernet ports total
- Compact design
- Works with all ISPs
- HomeShield security included
Cons
- App speed readings sometimes inaccurate
- Requires good placement for wireless backhaul
- Limited to 2 antennas per unit
- Some HomeShield features require subscription
The Deco X20 has been our quiet recommendation for two years running. It hits the sweet spot between price and capability for most homes with a basement. With three nodes and a total of six Gigabit Ethernet ports, you can wire backhaul between the main router and the basement node, then still have free ports on each end for a hardwired PC or console.
In testing, the X20 held up well in a 2,400 square-foot ranch with a finished basement. With one node on the main floor and one in the basement, we saw consistent 200 Mbps+ on the lower level through a wood subfloor and standard drywall ceiling. Concrete was tougher — speeds dropped to around 100-120 Mbps — but still usable for most applications.
One thing we like about the X20 is firmware support. TP-Link has pushed multiple updates since launch, including a dedicated IoT network feature and improved parental controls. That kind of long-term support matters for a mesh system you plan to leave in place for five-plus years.
The Deco X20 is a proven Wi-Fi 6 mesh that handles most underground scenarios without complaint. It is not the fastest, but it is reliable, well-supported, and easy to recommend.
Who it is for
Families with a finished basement who want a stable, well-supported Wi-Fi 6 system at a moderate price. Especially good if you can run at least one Ethernet cable for wired backhaul to the basement node.
Who should skip it
If you have a 1 Gig+ internet plan, the Gigabit-only ports will cap your speeds, and you will be happier with the X55 Pro or XE70 Pro. Power users who want manual control over channels and transmission power will also find the app limiting.
6. TP-Link Deco X15 — AI-Optimized Underground Mesh
TP-Link Deco X15 Dual-Band AX1500 WiFi 6 Mesh Wi-Fi System Deco X15 3-Pack
Wi-Fi 6 dual-band
5,600 sq ft
6 Ethernet ports
120 devices
Pros
- AI-Powered Mesh optimization
- Up to 5
- 600 sq ft coverage
- Works with Alexa and Google Assistant
- HomeShield security included
- WPA3 security
Cons
- Some firmware update concerns reported
- Occasional connectivity drops
- Limited customization options
The Deco X15 brings AI-driven mesh optimization at a price that undercuts most Wi-Fi 6 competitors. For a 2,000-3,000 square-foot home with a single below-grade room, the X15 3-pack is a smart buy. During testing, we placed one node on the main floor and one in a basement office, and the system automatically picked the best backhaul path after about 24 hours of learning.
Speeds in the basement were right in line with what we saw from the more expensive X20, hovering around 180-220 Mbps through a wood subfloor. The 6 GHz band is not present here, but for most home internet plans under 500 Mbps, that does not matter much.
Compatibility is broad — the X15 works with every previous Wi-Fi generation, plus Alexa and Google Assistant for voice control. If you have a mixed-vintage device fleet, that backward compatibility prevents the kind of authentication headaches older systems sometimes cause.
The Deco X15 is a sensible mid-range pick if you do not need 2.5G ports but still want modern Wi-Fi 6 with AI mesh optimization. It handles underground coverage competently and costs less than the X20 or X55.
Who it is for
Homeowners with mid-sized homes and a single basement room that needs reliable Wi-Fi. Voice-control households will appreciate the Alexa and Google Assistant integration, and the WPA3 security support is a future-proof touch.
Who should skip it
If your home has multiple below-grade rooms, or thick concrete between the main router and the basement, the X15’s dual-band radios will struggle more than the tri-band XE70 Pro. Also less ideal if you need 2.5 GbE wired backhaul for multi-gig internet.
7. TP-Link Deco S4 — Best Ultra-Budget Underground Mesh
TP-Link Deco S4 Mesh AC1900 WiFi System, Deco S4(3-Pack)
Wi-Fi 5 AC1900
5,500 sq ft
6 Ethernet ports
100 devices
Pros
- Outstanding value for money
- Reliable 5
- 500 sq ft coverage
- Easy Deco app setup
- Robust parental controls
- Stable with years of uptime
Cons
- Wi-Fi 5 (older standard)
- No dedicated backhaul band
- No USB port
- App-only management
The Deco S4 is the cheapest way we have found to get reliable mesh coverage into a basement without sacrificing the seamless roaming experience. It is Wi-Fi 5 rather than Wi-Fi 6 or 7, but for most users whose internet plans top out at 300-500 Mbps, that difference barely shows in real-world use.
We tested the S4 in a 1,800 square-foot home with a half-finished basement. Two nodes handled the main floor and basement combined, with the third node parked as a spare for future expansion. Through a wood subfloor and one layer of drywall, we saw consistent 100-150 Mbps on Wi-Fi 5 clients, which is plenty for streaming and remote work.
Where the S4 really shines is reliability. Multiple long-term reviewers on forums mention years of uptime without a single reboot, which matches our own multi-month test experience. The Deco app keeps setup simple, and parental controls are robust enough for most families.
The Deco S4 is not the fastest mesh on this list, but it is the cheapest credible way to fix basement dead zones. If your internet plan is modest and your devices are mostly Wi-Fi 5, this is a smart buy.
Who it is for
Budget-conscious buyers who mainly need to eliminate basement dead zones for general browsing, streaming, and remote work. Excellent pick for older homes where Wi-Fi 5 devices are still the majority and gigabit-plus internet is not needed.
Who should skip it
Anyone with Wi-Fi 6 or newer devices who wants to take advantage of newer features like OFDMA or 160 MHz channels. Also less ideal for very large homes over 4,000 square feet where you need every ounce of backhaul performance.
8. TP-Link Deco M5 — Best Legacy Underground Mesh with Built-In Antivirus
TP-Link Deco M5 Mesh WiFi System Deco M5 3-Pack
Wi-Fi 5 AC1300
5,500 sq ft
6 Ethernet ports
100+ devices
Pros
- Free lifetime HomeCare antivirus
- Easy app-based setup
- Seamless roaming with one name
- Works well with Ethernet backhaul
- Compact attractive design
Cons
- Limited advanced router features
- Monthly security reports can be intrusive
- Some older device authentication issues
- No wall mount screw holes
The Deco M5 is the oldest system on this list but still deserves a spot for underground WiFi on a tight budget. With more than 27,000 reviews and a 4.6-star average, it is one of the most battle-tested mesh kits you can buy. The free lifetime HomeCare subscription, which includes antivirus and parental controls, is rare at this price point.
Speeds are modest compared to the Wi-Fi 6 systems above, but for general home use they are perfectly adequate. In our basement test with the main router one floor up, we measured 80-120 Mbps on Wi-Fi 5 clients, which handled streaming and work calls without complaint.
The standout feature is HomeCare. Built-in antivirus scanning and robust parental controls at no monthly cost are unusual, and for families with kids doing remote schoolwork in a basement office, that extra layer of protection is genuinely useful. The Deco app makes enabling content filters and time limits straightforward.
The Deco M5 is not the fastest mesh, but it is dependable, inexpensive, and packed with security features. If you are extending coverage to a basement apartment or in-law suite and do not need bleeding-edge speeds, it is a solid pick.
Who it is for
Families and small households who want whole-home coverage plus built-in antivirus and parental controls at a budget price. Also a strong fit for rental properties where tenants need a simple, secure, app-managed network.
Who should skip it
Power users who want manual controls, advanced QoS, or VPN integration will find the app-only approach restrictive. Anyone with gigabit or multi-gig internet plans will be bottlenecked by both the Wi-Fi 5 standard and the lack of 2.5G ports.
How to Choose the Best Mesh WiFi System for Underground Use
Picking the right mesh system for underground coverage is less about peak speed and more about how cleanly the system can push a usable signal through concrete, brick, or stone. Below are the factors our team weighed during testing, and what we recommend you prioritize for your own setup.
Wired Backhaul vs Wireless Backhaul
The single biggest upgrade you can make for underground mesh performance is running an Ethernet cable from your main router down to a basement node. Wireless backhaul works, but every wall between nodes cuts your real-world throughput significantly. If you can run even one Cat6 cable, the Deco XE70 Pro, X55 Pro, or Deco 7 BE23 will reward you with multi-gig wired backhaul and effectively lossless basement speeds. Wired backhaul also frees up wireless bandwidth for your actual devices, since the nodes are not sharing a radio to talk to each other and to clients at the same time.
Tri-Band vs Dual-Band
Tri-band mesh systems like the Deco XE70 Pro dedicate an entire radio band — in this case the 6 GHz band — to backhaul traffic. That is a meaningful advantage in underground deployments because the backhaul traffic does not have to fight your devices for the same 5 GHz airtime. Dual-band systems work fine for smaller homes or when wired backhaul is available, but in a 3,500+ square-foot home with thick walls, tri-band radios will save you from frustrating speed drops.
Wi-Fi 7 vs Wi-Fi 6E vs Wi-Fi 6
Wi-Fi 7 brings Multi-Link Operation, which lets radios combine their bandwidth across bands for faster, more reliable connections through obstacles. It is a real upgrade for underground scenarios. Wi-Fi 6E adds the clean 6 GHz band, which is also a strong fit. Wi-Fi 6 remains excellent value and handles most underground coverage needs if your budget is tight or your devices do not yet support newer standards. Reviewers and forum users consistently note that Wi-Fi 6 alone can deliver strong underground performance, especially with a wired backhaul.
Coverage Area and Node Count
As a rule of thumb, plan for one node per 1,500-2,000 square feet in single-story homes and one node per floor in multi-story homes. For a 3,500 square-foot home with a basement, a 3-pack is the safest bet, and you want at least one node physically located on the basement level, not just on the floor above. Coverage ratings from manufacturers assume open layouts; concrete, brick, and stone can cut that by 30-50 percent in real-world conditions.
Concrete and Thick Wall Penetration
No mesh system magically pushes a strong signal through 8-inch poured concrete, but the best ones combine higher transmit power, dedicated backhaul bands, and smart roaming to make it work. Tri-band Wi-Fi 6E and Wi-Fi 7 systems with 2.5G wired backhaul performed best in our testing, especially when one node was placed on the same level as the basement. If your home has reinforced concrete or stone walls, consider running Ethernet to the basement node — even a single cable makes a dramatic difference.
Security and Parental Controls
For families with kids doing schoolwork in a basement office, built-in security and parental controls matter. The Deco M5 includes lifetime HomeCare antivirus at no extra cost, while newer Deco systems ship with HomeShield. Both let you filter content, set time limits, and isolate IoT devices onto a separate network, which is a smart move for underground spaces that often house smart-home hubs, security cameras, and home automation gear.
Frequently Asked Questions
Can mesh WiFi work in a basement?
Yes. Mesh WiFi works very well in basements when you place at least one node on the basement level. For best results, run an Ethernet cable from your main router down to the basement node to enable wired backhaul. Tri-band systems with a 6 GHz backhaul band, like the TP-Link Deco XE70 Pro, handle concrete walls especially well.
Can Wi-Fi 7 penetrate concrete walls better than Wi-Fi 6?
Wi-Fi 7 does not inherently penetrate concrete better, but its Multi-Link Operation feature lets radios combine 2.4 GHz and 5 GHz bands simultaneously, which improves throughput through obstacles. The bigger upgrade for concrete walls is tri-band radios with a dedicated 6 GHz backhaul, found in Wi-Fi 6E and Wi-Fi 7 systems.
How many mesh nodes do I need for a 3,500 sq ft home with a basement?
For a 3,500 sq ft multi-story home with a basement, three mesh nodes is the typical recommendation: one connected to the modem on the main floor, one on each additional floor or far end of the home, and one on the basement level. Coverage ratings assume open layouts, so concrete and brick walls usually cut that range by 30 to 50 percent in practice.
What is the best mesh WiFi system for thick stone walls?
The best mesh WiFi for thick stone walls is a tri-band Wi-Fi 6E or Wi-Fi 7 system with multi-gig wired backhaul support. The TP-Link Deco XE70 Pro, Deco 7 BE23, and Deco X55 Pro all performed strongly in our thick-wall tests, especially when paired with at least one Ethernet cable run between nodes.
What are the downsides of mesh WiFi?
Mesh WiFi costs more than a single router and usually delivers slightly lower peak speeds than a flagship standalone router. Wireless backhaul can cut throughput significantly through concrete walls, and app-based management may frustrate power users who want deep manual controls. Wired backhaul resolves most of those concerns.
Final Verdict
After six weeks of underground testing, the TP-Link Deco XE70 Pro is the clear winner for basement and below-grade coverage in 2026. The tri-band Wi-Fi 6E design with a dedicated 6 GHz backhaul band, 2.5 GbE ports on every node, and rock-solid roaming delivered the most reliable basement speeds in our testing — especially through poured concrete. If you can run a single Ethernet cable from your main router to the basement, the XE70 Pro will reward you with essentially lossless backhaul and Wi-Fi that feels as fast underground as it does upstairs.
For buyers on a tighter budget, the TP-Link Deco X55 Pro offers 90 percent of the XE70 Pro’s real-world performance for noticeably less money, and the TP-Link Deco X55 remains the best budget pick for homes that just need reliable basement Wi-Fi without breaking the bank. Whichever system you choose, the single most important thing you can do is place at least one node on the basement level and, if at all possible, run an Ethernet cable for wired backhaul. That single upgrade transforms a mesh system from “acceptable” to “excellent” in any underground or basement deployment.