Amazon-owned eero is selling a new add-on called eero Signal 4G LTE, a compact box meant to keep your home network online during internet outages. Plug it into a compatible eero router and your Wi-Fi can fall back to cellular data, so work calls, cameras, and smart home routines don’t instantly go dark.
There’s a catch, the cellular data is tied to an annual eero Plus plan managed in the eero app. The hardware by itself won’t provide the fallback connection, you’re also committing to eero’s service to actually use the backup.
It plugs in, then takes over
Signal connects over USB-C to any USB-C powered eero that supports Wi-Fi 6 or newer, plus eero PoE Gateway. It can share a single power adapter with the eero it’s attached to, which keeps the setup from turning into another pile of bricks and cables.
After you add it in the eero app, Signal stays in standby until your primary connection fails. When it does, Signal switches the whole network over to LTE, then drops back to standby once your ISP is back. No extra steps.
Where you place it matters because reception is everything. eero’s guidance is to pair Signal with the eero located where cell service is strongest, ideally higher up and closer to an exterior wall.
The subscription caveat
The backup connection runs through eero Plus, with two data tiers. The standard annual eero Plus plan includes up to 10GB of backup data per year, aimed at brief, occasional outages. New annual eero Plus subscribers who buy Signal get six months included, then the service renews at $99.99 for the next 12 months.
If you need more breathing room, eero Plus 100 includes up to 100GB of backup data per month. eero lists it at $99 for the first year (50% off), then it renews at $199.99 per year.
What to watch next
Signal is designed as a safety net at one address and it still expects a working primary internet connection most of the time, so it’s not a replacement for broadband. eero includes a three-year warranty and says Signal receives updates for security patches and new features.
Before you buy, check LTE strength where your router lives, then decide whether 10GB a year matches your typical outage pattern. If you can wait, eero says a 5G version is planned for later in 2026 with a $199.99 price.
Signal is available in the US for $99.99 on eero.com and Amazon.