Hello forum, I’m just trying to use Volte with TIM Brasil simcard in EG25-G but it does not work. I can get PDP address for IMS but it seems IMS registration itself is failing. Any advise or procedure to check will be welcome.
Hi，
AT+CIREG? // 3GPP standard command
+CIREG: 1,5
OK
If the first parameter returned is 1, it indicates that IMS has been successfully registered; if it is 0, it indicates that IMS has not been successfully registered.
The second item returned can be represented as:
If it is 1, it represents that VOLTE is available; if it is 4, it represents that IMS OVER IMS is available; and if it is 5, it represents that both VOLTE and IMS OVER IMS are available.
3GPP 27.007, section 8.71 says the return from AT+CIREG? is:
+CIREG: <n>,<reg_info>[,<ext_info>]
So I’d expect: +CIREG: 0,1,5 to be returned in your example.