AT&T had its 3G network sunset on February 22nd, 2022, and has informed Quectel. Since Quectel’s LTE Standard EC25-A modules have the Ue_Usage_Setting, which basically tells the network what's more important for that UE (voice or data) configured as Voice Centric if the user device does not support VoLTE after AT&T’s 3G sunset, the network service of the device will be shut down by then. Therefore, AT&T requires Quectel and its customers to modify Ue_Usage_Setting from Voice-Centric to Data-Centric when performing AT&T certification and actual network use.

 

Browan has taken necessary precautions and has new firmware in order to avoid cellular disconnection from AT&T. 

Please contact us for more technical support.