AT&T 3G network Sunset - February 22,2022

AT&T announced that they will be shutting down their 3G network in February 2022.  The sunset of the 3G network will impact some 4G LTE devices.  Unless action is taken to update affected devices, this situation could cause certain 4G LTE devices using voice-centric modems to stop working after the 3G network sunset due to the combined 4G & 3G network used by AT&T.  For more information and ongoing updates, please refer to the following knowledgebase article:

AT&T 3G Network Sunset February 2022

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Useful Links:

Service Manager Reporting System (SMRS) - https://smtools.att.com/webprod1/servlet/AuthenticateSmrscDirectServlet.class

Service Manager Tools (SM Tools) - https://smtools.att.com/webprod1/servlet/AuthenticateServlet.class

CPOC Tools - https://globalnetwork.support.att.com

ARMT Users Guide - https://accelerated.screenstepslive.com/s/att