Fifth generation of iPhone. Repair of this device is straightforward, and requires screwdrivers, prying tools, and patience. GSM/CDMA / 16, 32, or 64 GB / Black or White.

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Bootloop after baterry change

So...I`ve bought a cheap 4S.First problem at hand it needed a restore.Second i`ve changed the battery to make it work.Third...from time to time it shuts down and enters bootloop when i turn it on.I`ve changed the battery.Worked ok for a day.But last night it was on.In the morning was off.I restored it again.It worked for a few hours then turned it off.When i wanted to turn it back on, you guess...bootloop.Processor and ram might be dead?

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Black Friday
Broken doesn't stand a chance.

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I just changed the battery in a 4S and after it was put back together it was stuck in bootloop. I found the problem to be where the pressure contact was meeting the back of the phone. The metal was slightly scraped off on the inside back plate of the phone. It was a matter of deduction. First I thought the new battery was bad, so I checked it with a multi meter. It checked out fine. I knew the phone worked with the old battery. So, I tested the phone with the back off; I removed the back of the phone and plugged the phone in to the charging cord and the problem was gone. I put a new back on the phone and voila! No more bootloop.

Hope this helps!

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Sound like a faulty charge circuit which kills the battery too.

It should be overheating while idle and the battery should keep dying in a few hours.

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It dies in matter of 8 hours...From 7 in the morning until 3-4 in the afternoon.With 3G on and music on as well.

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I just had the same problem with an iPhone 4s. After I replaced the battery and reassembled the phone it was stuck in a boot loop. First I checked the new battery with a multi meter to make sure it wasn't a bad battery. It checked out okay. I knew the phone worked just fine before changing the battery. Second I took the back of the phone off and plugged in the power cord and the phone turned on just fine. I looked on the inside of the back plate of the phone and where the contact for the battery hits the back of the phone the metal was rubbed off slightly. I replaced the back of the phone with a new back and viola! No more boot loop.

Hope this helps!

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Stefan Predescu will be eternally grateful.
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