I am having issues with the 5G cards in my Android displays, I am currently on version RM520 version=5.04.
The screen is using Android 13 operating system
Ever thought about adding what problems you have in detail?
What is the device (Android displays?) you are using?
I am manufacturing 32” touch displays and recently i started added 5G chips to them so they can always be connected without wifi. I while back I got 2 screens and they work perfectly fine, Tmobile 5G is running smoothly on the. Recently i got 5 more screens and all of them shows IMEI numbers but cant read the SIM CARD, in Android (running v13) says No sim card inserted and if I terminal in to them i get
% adb -s 0CB80940 shell ‘echo -e “AT+QSIMSTAT?\r” > /dev/ttyUSB3’
+QSIMSTAT: 1,0
OK
and
% adb -s 0CB80940 shell ‘echo -e “AT+CPIN?\r” > /dev/ttyUSB3’
+CME ERROR: 10
both these issues are the SIM, but i also tried the SIM cards from the working displays with the same error, so it’s not the simcard themselves.
Everything else works
% adb -s 0CB80940 shell ‘echo -e “AT+QENG=\“servingcell\”\r” > /dev/ttyUSB3’
+QENG: “servingcell”,“LIMSRV”,“LTE”,“FDD”,310,410,8891709,188,850,2,5,5,871D,-109,-11,-78,15,0,-,20
OK
I even tried to update firmware to
% adb -s 0CB80940 shell ‘echo -e “AT+QGMR\r” > /dev/ttyUSB3’
RM520NGLAAR03A03M4G_A0.303.A0.303
At this point I don’t know what else to do or try.
Have you tried to exchange the 5G modules between a working and a non-working device?
Is the error then moving with the 5G module or staying at the same device?
I think RM520N-GL supports 2 SIM slots. Perhaps it is configured to the “other” slot?
1 Like
% adb -s 0CB80940 shell ‘echo -e “AT+QDSIM?\r” > /dev/ttyUSB3’
ERROR
So doesnt look like it
Check with
at+qsimdet?
at+quimslot?
You rock! it was the sim slot, I did this adb -s 0CB80940 shell ‘echo -e “AT+QUIMSLOT=2\r” > /dev/ttyUSB3’ and it worked