Galaxy S5 900A: data OK but no calls or SMS

[Alfonico]

Hello
My Galaxy S5 900A is able to surf the Internet, and to act as a mobile hotspot,
But I cannot make or receive calls, and I cannot send or receive SMS.
I have tried:
- Update to Marshmallow
- Wipe cache in recovery mode
- Reset to factory in recovery mode
These didn't change anything on the phone behavior (not better, not worse).
My phone presents an anomaly that could be the core reason of my problem:
Its label and IMEI are 900F.
But when checking with different tools, it is a 900A.
I was able to do an ODIN ROM flash using the 900A firmware update
I was not able to do an ODIN ROM flash using the 900F firmware update.
Any ideas?
Thanks and regards.

 

[philayl]

Are you sure it's not a problem with your service provider, might be worth trying a different sim card. Phil

 

[Alfonico]

Are you sure it's not a problem with your service provider, might be worth trying a different sim card. Phil

Thanks Phil for your suggestion.
I tried the SIM in an other phone, and it worked perfectly.
I tried another SIM from an other operator in the Galaxy S5 and the problem was identical.
Conclusion:
The problem is related to the Galaxy S5.