I'm using an LTE Module QUECTEL EC20 of this model connected to my Arduino as software Serial monitor and AT Commands directly, I can communicate perfectly with the Module, I get answer OK, Signal, IMEI, and a lot of commands with any problem.
I have a tone and I can answer the incoming call with ATA or hang up a call.
I've tried changing the baud rate from 115200 to 19200 and 9600.
I check all these commands:
Everything looks perfect but I don't get incoming data in my serial when I call or send an SMS.
I have experience with SIM800, SIM5320, SIM7600 of SIMCOM brand working perfectly, But this is my first time trying this model and I have a lot of 5, I tried with all.
I have like one-week looking for information and trying but without success.