EM7455 with OpenWrt

Hi @peacock

You should be using the PTCRB approved Generic PRI for T-Mobile
https://source.sierrawireless.com/resources/airprime/minicard/74xx/airprime-em_mc74xx-approved-fw-packages/ 34

Please check the PRI (configuration) with
AT!PRIID?
This should read Generic.

Please check the attach state with
AT!GSTATUS?

Please refer to the below topics for more details.
https://lists.freedesktop.org/archives/libqmi-devel/2019-November/003166.html