When I receive a call from Hiro to S3, in some places the dialer/phone app shows person who is calling me but when I press to answer the app freezes and I do not hear anything and the other person can’t hear anything .
After this incident the S3 has no sound anywhere in any browser , youtube , music / video player as if it does not have a speaker. If I restart the S3 sound works again until the Hiro calls me.
Weird is that when I call the Hiro there is no problem.
After some investigation I discovered that if I switch on the GSM mode S3 I don’t have this problem and I can get calls from Hiro. As you know on gsm the network speed is a few kb compared to wcdma.
I also did some tests and when outdoors with WCDMA mode the problem does not occur.
Also if I set Hiro on GSM and mine on WCDMA/GSM or just WCDMA there is no problem with my phone.
Both phones weren’t rooted or other interventions that would void the warranty , their firmware is up to date.
I do not understand why the S3 is unable to perform a basic function.
I tried the 2 sim cards in other phones but there is no problem, the problem only occurs when Hiro phone calls mine.
So far I have tried:
Reset to factory.
Clearing data from Dialer/phone app.
What is frustrating is that sometimes the connection between two works fine but when it doesn’t my phone ends up disabled with no sound.