Here is my phone detail Model number : ST27i Baseband version: u8500-49020914-P3A_ECO5 Build number: 6.2.A.1.100 I have upgraded the phone to 4.1.2 last two months. I saw a few problems: +When i switch to the silence mode for a few hours and then switch it back to general mode, the notification tone disappears, only vibration. I need to turn off and turn on again to get to tone +A bigger problem is about calling. Sometimes, It automatically end the call why i was talking. (Not all the time but very annoying) +And the last one is a few days ago, it is suddenly not sensitive anymore..even i restore the factory. Please help, should i go back to 4.0.4 or 2.7 (the original of this one is 2.7) or i need to check with the service center?
