This for sure works with ATT AND TMOBILE

Accordting to there website also works with verizon and possibly regular networks like xfinity. All retuns are welcomes this is refurbished item that was intially sold to Bank Of america but they never ended up using it.

This Cel-Fi Duo + Network Unit and Coverage Unit is an open box item that comes with a mount, charging cable, and signal booster. It has one port and is a wired/phone antenna port connectivity type. The unit type is a box and it can be mounted on a wall.

This signal booster is compatible with T-Mobile, Verizon, and AT&T networks. It is perfect for boosting your cell phone signal and extending your Wi-Fi range. Get this Cel-Fi Duo + Network Unit and Coverage Unit today for improved network coverage.