Just updated my 3gs to iOS4.2.1 and activate wiht Att SIM. I have noticed battery drain abit faster than it was at version 3.0.
I have it charged up 100% and leave on standby mode (with 15mins fetch email) for 9hrs the battery drain down to 89% . Is it normal drain for this iOS 4.2.1 ?
When I was using iOS 3.0, same amount of time in standby mode, the battery drained about 6%-7% (meant from 100% it went down to 94%).
is it normal drain ?