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S3 Lags while making calls
I have been trying to search this forum for this specific issue but couldnt find. My S3 (Android version 4.1.2) has sometimes a delay of around 20 to 30 seconds when I make a call. the call gets connected and the called person answers as well but my phone does not connect the call. I have been struggling with this issue for the last 3 to 4 weeks trying different options without any success. The issue is very frustrating because the called party mostly hangs the call in this 20 seconds delay. I took the phone to Samsung Service and they just formatted the phone and returned it back saying it s fine. And I have done this exercise twice now.
The problem starts occuring when I install some apps and start using the phone actively. This delay in connecting calls happens 3 out of every 5 times I make a call. And when my phone is out of my home network this happens more often. I have very few apps in my phone including WhatsApp, Facebook, Afaria, Temple run etc.
my doubts now are
1. issue in the SIM card - i get this doubt because the problem increases when the phone is in roaming
2. Afaria - After the last software reset, I installed the apps one by one to find the culprit. now I have everything that I use (less than 10) except Afaria and the phone seems to be working fine for the last 2 days
3. Hardware / OS issue - but unable to justify this as I have restored to factory settings more than once and sent the phone to Samsung for observation and all this did not give any success.
Has anyone else faced this problem or could give me some suggestions? Thanks in advance.