While using your phone, you may experience the Samsung Galaxy S 3 performing a little slower than normal, or it doesn’t even respond to your commands any more. The reasons may vary, but usually it’s caused by you having too many apps running at the same time. When this happens, you can soft-reset it.
A soft reset is similar to restarting a desktop PC, and this kind of reset usually does not affect your personal data on the device. Once performing a soft reset, it will shut down all active programs on your phone, and the phone memory is clear up. Here's how:
1. First press and hold the POWER key on the right side of the phone for about 10 to 20 seconds.
2. Then, tap Restart.
3. Next, hit the OK button.
4. Eventually, you will see the Galaxy S 3’s screen turn off.
5. You will then be able to switch the phone back on and resume all other operations as usual.