How to return to call when screen blanked I was on a call and I was put on hold by the other person. The screen blanked after a time (as expected). 
When I hit the power button to return to the call. I found the call dropped.

How can I resume the phone without losing the call.
(2.3-gingerbread samsung-nexus-s)
Check in settings > accessibility and see if theres an option for the power button to end the call. If there is make sure it's unchecked.