RM500U-CN Not registered

[Roney]

I have gone through all the basic debugging stuff. Checking connections physical, checking the bands etc etc. Everything checks out, yet the model is not able to register. I have also setup an APN and activated the PDP.

The AT+CEREG? output is 0,1

[silvia]

Dear @Roney
As we discussed in another topic, you have fix it, please add a flag of solution, then we will ignore this topic, thank you in advance.