If your Samsung Galaxy S9 has gotten stuck in a bootloop during or after it has installed a new software update, then you can find below the instructions on how to fix the problem. Note that the tutorial should be applied by advanced users only.
The Samsung Galaxy S9 official updates are normally launched when the developers think that no one's phone will get bricked by the files they are about to install, but from time to time something goes wrong and several devices are getting stuck in bootloop. If your phone is stuck in a bootloop, then the steps you need to take in order to fix it would be to factory reset the phone or force it somehow to boot in normal mode without deleting any data in the process. Below you can find several tutorials that will guide you through various fixes, but in case you cannot repair the phone using these, then we recommend you to take your phone to a professional Samsung repair center and have them take a look at your device.
How to repair Samsung Galaxy S9 stuck in a bootloop after a firmware update:
The Galaxy S9 devices have been updated a while ago to Android 9 Pie, but there are some users that are reporting that their units are unable to go past the Samsung boot screen. This bug might appear when powering off the device during the software installation, a thing that happens in case your phone's battery dies before the update is done flashing all the required files.
If this has happened to you, then you will most likely be forced to factory reset the device and restore it to its original settings. Before trying to apply any of the changes below you should charge the Galaxy S9 until it reaches at least 60% charge.
The first things you should try after the device is charged would be to power it back on and see if it manages eventually to boot in normal mode. If it is still stuck at the boot animation, then you have to try and force reset it by pressing and holding the Power button. The phone should reboot after ten seconds and it might eventually boot in normal mode.
If the Galaxy S9 doesn't boot in normal mode after repeated restarts you should apply the changes below.
Boot in Recovery Mode and Wipe the Cache Partition of the Samsung Galaxy S9:
Another thing you can try would be to wipe the cache partition of your Galaxy S9 and see if that allows the phone to boot in normal mode. Here's how to boot in Recovery Mode and wipe the cache partition of your device:
- power the phone off completely.
- next, press and hold Volume Up + Bixby + Power buttons at the same time.
- release the buttons when the Galaxy S9 screen turns blue and an Android logo is shown by your device.
- wait twenty seconds more for the Recovery Mode options to load.
- now select 'wipe cache partition' and confirm process.
- after the process is done you should reboot the phone in normal mode.
If this method fixes your Galaxy S9 and it boots your phone in normal mode, then you are done with this post and you can try to reinstall the firmware update.
If the cache partition reset doesn't repair your phone, then you are forced to factory reset the device by reading the steps in the next method below.
Factory Reset Samsung Galaxy S9 using Recovery Mode:
The Factory Reset process will delete all the data from your phone's system partition and it should restore it to its original settings and force it to boot in normal mode. No app that you had previously installed on your phone will survive the factory reset process. Here's how to factory reset:
- power off the device completely.
- press and hold Volume Up + Bixby + Power buttons at the same time.
- release the buttons when the Galaxy S9 screen shows the blue screen and an Android logo.
- wait 30 seconds more for the Recovery Mode options to load.
- select 'wipe data/ factory reset' option and confirm the process.
- reboot the phone in normal mode when you are done with it.
These were all the steps you had to go over in order to complete the factory reset of your phone. You can restart the device and re-add your default Google account login details and the phone should work as it did before. Also, make sure to try and reinstall the Android firmware update and see if it now completes the update process.
If you have any other questions related to this post you can tell us in comments and we will try to come up with a working solution.