To change your phone’s configuration, reset it to factory settings. Then you can configure it according to your wishes.
- Why the signal bar of one SIM card on the screen always disappears when I make a call with the other SIM card?
- Why has the icon for an app that I've installed become dimmed?
- How can I avoid high data costs while using mail?
- How can I manually change the Access Point Name (APN)?
- Why can't I use mobile data after removing SIM2?