I have a problem with EM7455 when using a Verizon sim.
When I send a sms delete command (mbim_cid_sms_delete) to the EM7455 module it either stalls (until I power cycle it) or it simply reboot by itself.
The EM7455 is running the latest firmware SWI9X30C_02.33.03.00/002.079_001, and I see the same behavior on older firmware.
I have tried the sms delete command on a many other sim card/mobile network and there it works without any problems.
Sending and receiving sms’s works fine.