Chosen Solution

After battery replacement, iPhone while is power on, touch stop responds and in 1-2 minutes device restarts. Restarts keep happens and while is in standby. The problem is not appeared in specific time after boot up. I tried 3 different new batteries and the problem still apears! I tried also to reinstall the old battery and the problem disappeared! I dont know what to do… With the new battery I have better battery life but device keep restarting which is very annoying… With the old battery I have no restarts but it needs charging every 3-4 hours! Anybody can helps? Device: iPhone 4S iOS 7.1.2. noJB PS: I have to higlight that I changed the battery 2 more times in the past whithout any problem…what happens now???

Check to make sure the new battery has the same APN number as the old battery. I remember when doing battery repairs for this model, we thought we received a bad batch of batteries (all were not working, or causing restarting issues), but it was an issue where some phones would act strange unless it had a specific APN number or the same APN number as the original.