The brightness option in the notification bar is missing after the I9300 Android 4.1.2 is upgraded.

GT-I9300 phone upgrade Android 4.1.2 system, the original bar icon can be changed. If you accidentally cancel the display of the brightness adjustment option during use, you can retrieve it as follows:

1. Click application on the standby page ].

2. Click set ].

 

3. Click show ].

4. Click notification panel ].

5. If you want to add the brightness adjustment option, you can check the brightness adjustment.

After the preceding operations are completed, the brightness adjustment options are displayed in the notification bar.