I have an AT&T iPhone 4 and I charge it every other day. I recently took a trip to Turkey and had my AT&T iPhone with me. I did not use it for any calls. I had reception from the local provider just in case. I had roaming and 3G off the entire time but I did have it connected to the hotel's wireless. The problem I was experiencing was that the battery would drain way too quickly. I would have 60% of the battery before bed and when I wake up 7 hours later it would be totally drained. I had to charge it at least once a day. I am back in the US now and the issue is gone. I have 3G on and it's constantly connected to the wireless either at home or work. Last night I had 60% of the battery and I still had about 50% in the morning. Is it a known problem that the battery drains quicker when traveling abroad? Is this expected?