NOTICE: Effective July 1, 2022, the wireless network used by the Ooma Telo 4G Adapter will be deactivated by T-Mobile. Ooma will provide the new Ooma LTE adapter free of charge to all customers who purchased the Ooma Telo 4G kit, the standalone Ooma Telo 4G Adapter, or the Ooma Phone Genie. If you have an Ooma 4G Adapter and have not yet received a replacement Ooma LTE Adapter, please contact Ooma customer support at 888-711-6662.


For the best 4G signal, the Telo 4G Adapter should be placed in an area of your house with good cellular reception such as in a room with a window. It should ideally be located as close as possible to a window. Suction cups may be used to mount the adapter directly against a window. The adapter should not be placed in a corner, against a wall, or within five feet of a large metal object like a water heater or refrigerator.