do all older iPhones screw up on ios 4?
I got this phone from a friend that quit turning on. I brought it home conntected to itunes nothing , then a flash white screen. I took it apart and saw that it seemed like the battery had maybe leaked. So I soaked and scrubbed it dried it ,viola it worked. Except the phone would shut off after about 5 minutes and i noticed the battery percent would react weird during boot. I've read about the os 4 messing up the battery and the speaker is low which i've read too. Are all versions of ios 4 going to have a problem on the older iphones or am I gonna try to have to downgrade back to 3 to see if this is the problem I like the ios 4 but if it won't work causing it's pushing it too hard then no choice.