iPhone screen goes black during call
I have used Google (and this forum) to read about this and I do not have a plastic film and it does not matter if I use a cover or not.
If I make a call:
everything is normal until I actually go ahead calling, then the screen goes blank after approx 1 sec and then it does not matter what I do, the screen stays blank.
The only 2 solutions are if the person at the other end of the conversation ends it OR if I repetedly keep hitting the sleep/wake button.
It does not matter if it is me calling or if I answer an incoming call. It does not matter if it is asleep or awake when I answer a call, the screen still goes blank.
If I put my thumb over the proximity sensor and then make a call (or answer an incoming call), the screen goes blank BUT +when I remove my thumb from the sensor the screen lights up+ for about 1 sec and then goes blank.
If I use headphones the screen never goes blank.
If I try to connect headphones after the screen has gone blank, the screen does not light up.
If I hold my thumb over the proximity sensor and then answer the call and after the screen has gone blank ... then connects my headphones and then removes my thumb - the screen lights up and does not go blank again.
If I have the headphones connected and answer a (incoming) call the screen does not go blank. If I then unplug the headphones the screen goes blank. But if I first tap speaker and then unplug the headphones the screen does not go blank. But if I then tap speaker again the screen goes blank.
This makes the iPhone almost useless as a phone. Apple does not manage support themselves in Sweden. They tell you to go through your operator. Mine is TeliaSonera and they think it's a hardware problem and tell me to take it to the store (warranty).
But the sensor does react to my thumb being there and then removing it - it seems to me that whatever it is that is using the sensor is malfunctioning?
Any ideas for further troubleshooting or how to solve it?
iPhone 3 G 16 GB, iPhone OS 3.0, Bought it 15 May 2009