I am trying to connect to NSA network with RM502Q-AE which should support US bands, I tried initially with Verizon but I quickly noticed that it was not working properly. I tried to change for TMO 310:200 PLMN but I can´t connect to NR, only LTE is working. I verified with working phone that the sim card is working properly.
My question is, where the problem could be with the modem? Do you have any suggestions what commands I should run to debug the error?
Thanks in advance.
Please operate these AT commands and send the returns to us, thanks!
Thanks for quick answer, here are the outputs:
+COPS: 0,0,“T-Mobile NSN”,7
Do your simcard support nr5G? do your testing environment have nr5G signal?
Can you try to fix the module into nr5G mode by sending AT+QNWPREFCFG= “mode_pref”,NR5G
Try setting the modem to 5G only via the command provided by Peter.Zhu-Q
If the 5G signal level is lower than 4G-LTE at your location, the modem will automatically switch to 4G-LTE.
5G may work in your test phone, but every device picks up the signal differently and have different prioritization settings. Double check all the antenna connections to your modem, because a bad connection could also cause the 5G signal to fail.
After forcing the modem to 5G only, but still not getting a 5G signal/connection, it may be caused by the following:
- Lack of 5G signal at your location
- Bad antenna connection
- Carrier may not recognize your modem’s imei as a valid 5G device, therefore the tower falls back to 4G-LTE.