Good morning.
Module: EC25;
Revision: EC25AFAR62A01M4G_BETA0515.
I have been facing difficulties to establish a GPRS connection with one of the four greatest brazilian ISP.
The sim cards from two of them work perfectly, however, to the ISP “Oi” we could not connect to the peer.
We have ran the following commands (the arrow indicates the results):
AT+CFUN? -> +CFUN: 1
AT+COPS? -> +COPS: 0
AT+COPN -> More than one thousand results, among them “Oi” ISP appears with the codes: +COPN: “72416”,“Oi”, +COPN: “72424”,“Oi” and +COPN: “72431”,“Oi”.
With the outcome of the last AT command, we tried to register to the network operator:
AT+COPS=1,2,“72416”
AT+COPS=1,2,“72424”
AT+COPS=1,2,“72431”
All of them returned “+CME ERROR: 30”
With my smartphone, the simcard connection works flawlessly. Does anyone know what is happening?