User Guide

AT&T register issue & APN Settings
If you cannot register the AT&T SIM card, please check you APN and change
the APN setting and try again.
How to get your APN
Different types of SIM cards may have different APN settings, so you can
check with your local operator for the correct APN settings.
Auto Setup failed
Auto Setup will try all the possible methods to build a connection. In case Auto
Setup fails to connect, please try manually setting and selecting the
appropriate connection protocol.
Use the QMI protocol
Select device as /dev/cdc-wdmX and fill in the correct APN.