How to make a new dark look on your samsung device ?1. Open settings .2. Select accessibility option and open it.3. Then select visibility enchanements .4. Then select high contrast theme , and it got 2 options for just select it and it will take ...

For this problem .1. Open settings.2. Open general management.3. Go to reset option .4. Select reset network settings , select your sim .5. And your are finished .For Samsung A series , and M series