Stuck in bootloop. Please help!!!!!

YukiYamada

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Aug 31, 2021
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Hi everyone! I really appreciate it if you can help! I connected my ZTE AXON Pro phone to the computer and deleted some folders and files in my phone through Android File Transfer, and the phone worked normally after I deleted the files. But the next day when I turned it on, it was stuck at the "AXON" logo screen. I went to two local repair shops. One could do nothing about it and suggested me to contact a data recovery company since I need the data in my phone. The other shop thought my phone was fairly old (I started to use it in 2017) and they suspected that the battery had gone bad and wasn't supplying enough voltage for a full boot cycle. They ordered a new battery and tried floating it plugged in, but the phone still wouldn't boot. They said the motherboard was also getting very hot approximately where the power supply chip would be. They tried to charge the new battery but nothing brought the phone to life, so they diagnosed it as a power supply chip failure. They couldn't fix it. After that I put the phone in recovery mode and wiped cache partition, but it still wouldn't fully boot up and it's stuck in bootloop: Now when I turn it on it's stuck at the "AXON" logo screen for a few minutes and then "Android is starting...Optimizing app 1 of 3.""Android is starting Optimizing app 2 of 3.""Android is starting Optimizing app 3 of 3." show up, and then "Android is starting apps." shows up. Then it restarts and stucks at the "AXON" logo screen, and repeats the loop over and over again until the battery is completely drained.

I really don't know whether the problem was caused by the assumed power supply chip failure or by me deleting the folders (the phone has never been rooted). My phone used to overheat easily and the battery drained faster and faster, but the bootloop just happened when I turned on the phone the first time after I deleted the folders. Is it just coincidence if it's the power supply chip problem? So I'm really confused about this: Can deleting folders and files in a phone which has never been rooted, through Android File Transfer, cause bootloop? I googled and found some people say deleting folders and files in unrooted phones doesn't cause system malfunction, and that if some files related to the apps are deleted, they will be recreated automatically if needed, and that system files can't be accessed by you if the phone is not rooted. But I also found some say deleting things can cause corrupted apps which cause bootloop.
 

B. Diddy

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I doubt it has anything to do with you deleting a folder. On an unrooted phone, you can't accidentally delete something that's crucial for the system. I think it was probably coincidence.

You've never backed up or synced your important data over the 4 years you've owned the phone? Like in Google Drive, Google Photos, OneDrive, or any other cloud service? I'm afraid there may not be much you can do besides bring the phone to a data recovery specialist (which can cost hundreds of dollars). Sorry!
 

YukiYamada

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I backed up my data sometimes. Could I know if you know how to put the phone in safe mode when it's stuck in bootloop?..I tried it, but failed, and I asked the manufacturer, the ZTE store support. They replied saying I just can't get to safe mode from bootloop. But I googled and saw there are instructions on how to put a ZTE phone (not the same model as mine) in safe mode while it's stuck in bootloop. I tried it, but I just failed. I don't know if I did it wrong..
 

YukiYamada

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Thanks, I tried several times in this way, but I couldn't boot it into safe mode and instead it shows "FTM Factory Test Mode. To exit, please long press the Power Key. Avoid pressing the Volume key when turning on handset."..
 

B. Diddy

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Some Chinese brands don't allow the user to boot into Safe Mode, for some unclear reason, so that may be the case for your phone. Either that, or the phone's hardware or firmware is so faulty that it can't even get past the initial boot. Sorry, but I don't think I have any other solutions to try.
 

YukiYamada

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The ZTE store support said if the ZTE phone works normally I can boot it into safe mode, but my phone is stuck in bootloop, so I just can't get to safe mode..Thanks anyway
 

mustang7757

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Thanks for replying! I posted on xda forums and someone told me to try safe mode, and I just couldn't get to safe mode
Safe mode wouldn't fix a bootloop you probably going have to flash the stock firmware, does the computer recognize the device?
 

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