Released September 16, 2016. Model 1660, 1778 Available as GSM or CDMA / 32, 128 or 256 GB / Rose gold, gold, silver, black, and jet black.

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iPhone 7 iOS 11.0.1 Boot Loop?

BACKGROUND INFORMATION

A few days after the iOS 11 update, my iPhone 7's cellular signal has been inconsistent stating "no service" or "searching" for long periods of time. This happens inside my home and outside. Usually I'm able to connect to my cellular network inside my house, but it's been malfunctioning lately.

TO FIX THE CELLULAR PROBLEM, I'VE TRIED...

  • Restarting the iPhone
  • Removing the SIM card, gently wiping the SIM card, and blowing inside the SIM card tray hole
  • Resetting Network Settings multiple times, and turning ON and OFF Airplane Mode a numerous amount of times.
  • Checking for a Carrier Update
  • Fiddling with cellular settings such as turning OFF LTE or changing settings within the LTE settings.
  • Fiddling with Date and Time settings because apparently setting the date and time automatically causes issues.
  • None of these resolved the problem.

If I tried updating my phone to iOS 11.0.1 when the phone was not connected to a cellular network, even if I was connected to wi-fi, I was prompted with the Unable to Verify Update iOS. Yesterday, I miraculously obtained a cellular connection and was able to update my phone to iOS 11.0.1 thinking it would fix my cellular problem. It didn't. When I woke up this morning, the phone was back to "searching" or "no service" even though it was already connected to the Verizon network before and after the update.

HOW THE BOOT LOOP STARTED

During the day, my phone turned itself OFF and ON again prompting me to enter my passcode. This happened about two times within a four minute interval. A few minutes later, my phone turns OFF again and attempts to restart, but this time it never passes the Apple logo. It displays the Apple logo for a few seconds and then the Apple Logo would disappear for few seconds. It would then display the logo again and then disappear. This cycle never ends.

WHAT I'VE TRIED

  • If i try to put the phone in recovery mode while not connected to a PC, it shuts the phone off.
  • If i try to put the phone in Recovery Mode while connected to iTunes, iTunes will prompt me to "Update" my phone stating that it will attempt to reinstall iOS while also keeping my files. Once it tries to install, the iPhone restarts showing the Apple logo with a loading circle underneath, which turns into the loading bar that shows up when you're updating your phone. The loading bar shows up for less than a second then the screen goes black, and the iPhone restarts and automatically launches Recovery Mode. The 4013 error is displayed on-screen and iTunes stops recognizing that the phone is plugged in. Keep in mind that the iPhone is still on the Recovery Mode screen. After reconnecting the lightning cable, iTunes then prompts that the phone cannot be "Updated" so the only other option is to factory reset the iPhone, erase all data and settings, and optionally restore from a back up after the factory reset. The same things happens as before.
  • I've tried other programs such as 3u Tools to install iOS. I've tried reinstalling the new BETA iOS 11.1 and the more stable iOS 10.3.3. The same glitch happens where the phone displays the loading bar momentarily before restarting and heading back to Recovery Mode ultimately voiding the update.

Has anyone dealt with this or would like to provide any more things to try? I've never had a problem with an iPhone before when it comes to software, but could it be possible that this is a hardware issue?

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Im trying to repair a water damaged iPhone 7. Same problem! Endless loop! I did a 2 times ultrasonic clean of the motherboard, but the problem continued. So I forced the phone into recovery mode and exactly like you explained the phone reboots just as you see the progress bar appear, then iTunes shows error 1413.

This phone however is running iOS 10 and was running fine until the customer got water in it!

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I attended my Genius Bar appointment today at my local Apple Store and the guy told me it was definitely water damage. Apparently it is indeed possible for software to brick hardware as well. I was 13 days over my warranty, but the guy voided the replacement fee for the phone to "make my day", and I backed up from iTunes just fine.

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Chosen Solution

An Error 4013 message after upgrades and subsequent boot-looping sounds like a corrupted NAND. You probably didn't do anything wrong, it just happened. How full was your memory prior to the update. I have seen very similar (everything minus the LTE issues) on other iPhones and the problem is NAND corruption.

If this is indeed the issue, the only fix is to desolder the NAND, reprogram it and then reball/re-solder the NAND. Not a trivial repair and certainly not DIY. At this point, you should consider looking for an experienced micro-solderer to troubleshoot and repair the phone.

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