Galaxy S4 owners are reportedly experiencing rebooting issues after the Android Lollipop upgrade.
The problem basically has two variations: for some users the phones work fine, but there are random reboots; others have reported that they are unable to boot their devices after the upgrade.
There are possible fixes available for the problems.
- Random reboots several times a day
- Freezing and lag issues
- Rebooting on call
Your phone could be experiencing these issues after a major update due to corrupt data and cache. The upgrade from KitKat to Lollipop, which brings in a lot of changes for some apps, could create several issues.
The Android system creates files for apps. These files are used to make them run smoother and some of them contain the user's preference. When new firmware is installed, these files become obsolete and if they are not cleared, the conflict starts and your system might throw up lags and even freezes. Try the following troubleshoot to deal with the issues created by downloaded apps.
- Turn the device off completely and then press and hold the Power button
- When the Galaxy S4 logo appears on the screen, release the Power button while holding the Volume Down button
- Once you see Safe Mode at the bottom left corner of the screen, release the Volume Down. Otherwise, repeat the process until the phone boots into Safe Mode
- In Safe Mode, from the Home screen tap Menu
- Click on Settings then Accounts tab
- Under Backup options, click Backup and reset
- Click Factory data reset
- Then Rest device
- Tap Delete all
Galaxy S4 caught in bootloop
- Phone does not start
- Stuck in boot loop
- Black screen
These issues crop up while trying to install a custom ROM. Pretty much similar to the previous one, this is also related to corrupt cache or data, but in the latter the Android system is prevented from loading the interface. Wiping the cache partition is one of the possible fixes for this.
- Turn off the Galaxy S4
- Press and hold Volume Up, Home and Power buttons together
- When the phone vibrates, release the Power button but continue holding the other two buttons
- When the Android System Recovery screen appears, release the Volume Up and Home buttons
- Press the Volume Down to highlight wipe cache partition
- Press the Power button to select it. The phone should automatically restart after the cache is wiped.
Performing data factory reset
- Switch off the phone
- Hold the Power, Volume Up and Home buttons together for about 10 seconds and release them once you see the Android logo on the screen. This will bring the unlock/reset menu.
Note: Use the Volume Up/Down button to scroll up and down and the Power button to confirm selections.
- Scroll down and select Wipe data/Factory Reset
- Now select Yes-Delete All User Data
- When you see prompt, select Reboot System now. Your phone will reboot to its factory reset settings
If the factory reset fails to work, you might have to take your phone to the nearest Samsung service centre. Alternatively, you might flash a custom ROM although that would void the warranty of the device.