How to Reset App Preferences on HTC One
You can reset the entire preferences, assigning apps for specific actions, disabled notifications, data restrictions. To Reset App Preferences on HTC ...
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Follow these steps to setup SIM Card Lock on Android devices, like Samsung Galaxy Series and other devices:
1. Open "Setting" App
2. Go to "Security"
3. Tap on "Set up SIM Card Lock"
4. Make sure the "Lock SIM card" is marked. (You need to know your SIM PIN to use this feature. On some SIMs the PIN is 0000 by default)