Released on September 19, 2014, this 5.5" screen iPhone is the larger version of the iPhone 6.

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Why does my iPhone keep rebooting

Alright so my iPhone 6 plus keeps doing the boot up cycle over and over. I have tried to factory restore it through iTunes but it is too quick to reset. It kept getting stuck on the connect to itunes screen. I fixed the connect to itunes but it still does the boot up cycle. I am wondering if this is battery failure or power button failure. ifixit community please help me.

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You can use your iPhone for a while with no problem at all, and then your iPhone suddenly restarts. https://apkauthority.com/

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A lot of things could be causing this. The easiest thing to check is the battery. Open up your device and disconnect the battery. If you have a multimeter, you can measure the voltage of the battery directly at the terminals. It should read ~3.5V in order for the phone to boot. In your case, if the voltage is lower, it could be a sign of a bad battery or an issue with the charging circuit. Considering that you have an older device and that the battery was never changed, the most likely situation is a bad battery.

If you don't have a multimeter, then you can just simply order a replacement battery and try it.

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one problem is is the kit i have doesnt have a suction cup... also tried a thin razor to pry it up

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Razor blade??

Err...that is not the best tool by any stretch. Do you mean prying the battery or screen? You may have damaged something with the sharp edge. Do a thorough visual inspection.

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Everything is fine but I just need to pry the screen up so i can see if the battery needs to be replaced

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I have replaced the battery with a new one Phone still reboots at random. battery percentage will show 1% as soon as you plug the charger in it will go up to somewhere around 40% while charging it will still reboot at random.

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