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

AT&T has announced that the 3G network will be shut-down 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 to stop working after the 3G network sunset due to the combined 4G & 3G network used by AT&T. 

For AT&T VPN Gateways – U110/U115 devices with the Telit Cat4 modem, the minimum required Telit firmware level is 20.00.505 and the minimum required software level is 7.2.652.
                                                 Note: U115 devices with the Sierra Wireless Cat7 modem are not affected.

AT&T support is updating Telit firmware levels for active devices. Customers with devices that get automatic code upgrades will not need any additional actions. Devices that do not have automatic upgrades should be checked and upgraded manually. Devices that are not active (spares, undeployed, etc) should be plugged in and upgraded prior to Feb’22 to avoid any possible issues.

For Digi Cell Extenders - 6300, 6310 and EX15 devices should not be affected. For more information on Digi devices and ongoing updates, please refer to the following knowledgebase article: AT&T 3G Network Sunset February 2022

Useful site links:

SM Tools - https://smtools.att.com/webprod1/servlet/AuthenticateServlet.class

SMRS - https://smtools.att.com/webprod1/servlet/AuthenticateSmrscDirectServlet.class

U115 Setup - https://u115start.com/

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

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