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

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iPhone keeps rebooting. I know the problem, don't know how to fix it.

My iPhone 6 plus screen broke after falling. I replaced the screen and worked perfectly fine. A week after replacement, phone starts rebooting and stuck in a loop. Tried multiple ways to get it out of the loop (soft reset, hard reset, recovery mode etc) but couldn't.

I took it to the technician and said battery needs replacement. I replaced it and worked fine for another 48 hours and the problem happened again. Took it back to him, now he says it's something with IC processor. Tried another technician said it was software, and another said possibly processor. I ignored them all.

Then I noticed something, when I apply pressure at the center back of the phone while it's booting, it works. It worked for the past 48 hours, then got into boot loop again. Applied pressure again, now it's working fine, until I don't know when.

What can be the issue?

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First of all, the iPhone 6 Plus is prone to logic board issues because of housing flex (drops exacerbate the problem). The infamous Touch Disease is a well known and sadly widespread problem. Your description of applying pressure making the phone work is pretty typical of some of the passive ways folks used to temporarily help with Touch Disease.

You clearly have a logic board issue; whether it's the CPU, NAND or any other IC, I can only speculate. The big question is should you spend money trying to fix this problem or not. An experienced micro-solderer will easily cost 100 - 200$ unless they find something obvious and easy to fix. I would also be concerned with latent issues. One thing is certain, if you haven't been doing backups now would be a good time to start.

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Thanks @refectio. My concern is also the latent issues that my be caused/shoen later.

Hello new iPhone.

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