Last week I decided to let my Galaxy S10 preform a system update that had been pending for a while, but ever since then, it's kept my phone in a constant bootloop that I can't seem to exit no matter what I do.
The process generally goes from no power, then a simultanious vibration and samsung/knox protection screen, to darkness again, then rinse and repeat as long as the battery has power.
I tried booting it into safe mode but since the screen never reaches the second logo in the boot process, I assume it'll never work. I also tried booting it into recovery mode, but rather than popping up with a menu, sometimes it attempts to install the system update again with no luck, and reverts back into the bootloop, or sometimes has a split second scenario which looks like it's loading the recovery mode menu, where the "Installing system update" screen appears for a quarter of a second, then followed by an error screen for another quarter of a second. It never reaches the menu however, as the screen goes black afterwards, and resumes the bootloop issue once more.
I can access the download mode screen just fine however, which leads me to wonder if flashing a system update externally would work at retrieving the phone and all it's data? It does say that FRP is On, however, making me wary before proceeding with any custom downloads of any sort.
Any idea what I can do to fix this, or advice for using the custom download mode in general?
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Hello @CaselessJoe ,
Because you have done all of the basic troubleshooting youve reached the step where you need to have the device inspected by a technician. To do so you can either mail in to Samsung or go into your local certified Samsung facility. Im going to provide a link that allows you to choose between which you would like to do. I wouldnt reccomend attempting to download any customer software.
For Samsung Care Authorized locations near you:
Hope this was helpful!
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I you are like me... I have similar issue with S8+ and phone out of warranty which means big bill to be fixed with money I don't have..
If you are willing to accept that whatever is currently on the phone is lost and you can accept to start again (unless of course you have a back up via Samsung Cloud) then you can try flashing the rom.
For me I only did this once I had accepted that I could completely kill the phone if something goes wrong.
If you can get the phone to download mode, then you might have a chance. I think this was, make sure the phone is off and then press and hold power, bixby and volume down (google it)
Google it lots as I am not an expert, but the basics are:
- Download software called, Odin (I have version 3.13.1) which is freeware
- Download software called, Frija which is also freeware. This is were you can obtain the correct system files to re-write the firm ware.
Just make sure you dowload the correct CSC version which is often determined by the original telecoms provider; you are looking for a 3 digit code. For me in the UK it was vodafone so it is VOD, but now I am in Australia with Telstra, so is is TEL. one I know in the USA is AT&T which is ATT.
With these to bits of software on a PC, a USB and your phone and you might be able to get a funcitonal phone again.
Check out other forums for support if you are not able to go down the Samsung route.
Hope this helps.
This definitely sounds like a hardware issue and must be addressed at a repair center. If you want to find a repair center in your area, click on the link below and enter your zip code. Before you go the repair center, I highly advise you to backup all information on your phone if possible to avoid any data loss. Also be sure to call ahead before making your trip to the repair center. All the contact information is on this link once you enter your zipcode. https://www.samsung.com/us/support/service/locations/?product=N0052144
So if you are able to access the recovery menu, you can do a factory reset. To do so, you need to hit power button, Bixby button, and volume up button together at the exact right moment when Samsung logo appears. The timing has to be perfect. Luckily someone at the Verizon store helped me do this or I would have never gotten it on my own. I was holding the buttons too long or pressing then at the wrong time. It's tricky. But my phone was fine after they helped me do a factory reset.