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Repair information and guides for the Apple iPhone 5s that was announced on September 10, 2013. Model: A1533, A1453, A1457, A1528, A1530, A1518

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iPhone 5s bootloop issue

Hi guys i have an issue with my 5s and its running okay for a days then it will start to restart all over again i need to wait for hours then the phone is running okay again .When i try to turn it off and power it on again it will go with bootloop again what would be the issue of the phone ? Theirs no such problem on the phone itself its just it keeps on restarting sometimes its like happening 2 x a month i need help because i will try to update my phone to ios 11 and im afraid it will not be succesful because of the issue

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About the reboot loop issue, there are some questions raised as follows. This article will answer them one by one. Read on, you may get some ideas of what you should do when your iPhone stuck in bootloop, or said keep restarting.

https://www.forecovery.com/fix-ios/iphon...

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Boot looping can be caused by many things. Your problem is that it is intermittent in nature. Next time it does it though, I would take note of what happened just before to see if there is any kind of trend.

Try these things (next time it happens) to see if anything helps:

  • Try a hard reset (Home & Power button for 10 secs)
  • Use a genuine Apple Lightning connector
  • Use a genuine Apple charging brick and let it charge overnight
  • Try to connect it to different computers (mac/pc if possible) with an updated iTunes
  • Put the phone in recovery mode (search DFU Mode). Careful, this can reset your data
  • Use 3uTools for putting it in and out of Recovery Mode
  • Use 3uTools to flash the firmware (you can't downgrade)
  • Check the condition of all the flexes (with magnification)
  • Disconnect the Front Camera Ribbon from the logic board and reboot your phone
  • Disconnect the screen assembly completely and see if iTunes will recognize the phone.

Otherwise, you may have a logic board issue. If you are uncomfortable doing these steps, consider finding a repair shop to do the troubleshooting. A shop that also does micro-soldering can go deeper if the problem is not modular in nature.

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I went to the repair shop and said i should change my board because its a power ic issue and nand issue what is that ?my phone is still usaeble

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Boot looping can be caused by a corrupted NAND (which is the main memory of your device). But that is usually accompanied by a totally unresponsive phone and it will give iTunes errors. Your phone works most of the time so it's hard to say what is what. If the problem is degenerative, you will find out soon enough.

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Is that very expensive to be repaired ?what is degenerative ?how to solve corrupted nand and what is its main cause or problem

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By degenerative, I mean a condition that will worsen with time. For example, a bad solder joint under an IC will get worse with time and you will see the symptoms more and more often. If it is a NAND issue, that requires that it be de-soldered, re-programmed on a special machine and soldered back into place. These are micro-soldering repairs and the price can vary between 100-200$ in the USA. Some might charge more, some less...

The problem with the iPhone 5S is that the trade-off point has been passed due to it's relative low value, depending on where you are in the world.

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