When your Samsung Galaxy S6 Edge enters a boot loop, it means there are some inconsistencies in the operating system or its firmware. More often, the boot loop problem occurs if the owner rooted or flashed a custom firmware into its device, although there were also cases that this problem occurred after an update was installed on a stock firmware. About 95% of the time boot loop is firmware-related.
There's two ways to try and fix this;
Wipe Cache Partition
There is a directory in the system partition where all caches for core services and applications are stored. These files are used by the system to make its performance smoother the next time you launch those apps. More often, corrupt caches will create conflicts with the system especially if there were already new files created by the new firmware. Clearing the directory will indiscriminately delete all files stored in the partition but don’t worry, the next time the phone boots up, it will create new files or caches.
- Turn off the device.
- Press and hold the following three buttons at the same time: Volume Up key, Home key, and Power key.
- When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
- When the Android System Recovery screen appears, release the Volume Up and Home keys.
- Press the Volume Down key to highlight ‘wipe cache partition.’
- Press the Power key to select.
- When the wipe cache partition is complete, ‘Reboot system now’ is highlighted.
- Press the Power key to restart the device.
Obviously, you can’t perform the typical factory reset because the phone can’t just boot up completely. Booting in recovery mode, however, will give you access to an operation that will not only delete all files, settings, app and data, but will also reformat the partition itself to get rid of any corrupt files the system won’t use. In other words, master reset is more effective than factory reset. You only have to do this if the phone still boot loops after wiping the cache partition:
- Turn off your Samsung Galaxy S6 Edge.
- Press and hold the Volume Up, Home and Power keys together.
- When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
- Wait until the Android Recovery Screen appears after about 30 seconds.
- Using the Volume Down key, highlight the option, ‘wipe data/factory reset’ and press the Power key to select it.
- Press the Vol Down button again until the option ‘Yes — delete all user data’ is highlighted and then press the Power key to select it.
- After the reset is complete, highlight ‘Reboot system now’ and hit the Power key to restart the phone.