HT204306: If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled
Learn about If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled
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Q: I upgraded my iPhone to iOS 10 and know unable to use lock screen an it restarts by his own what can i do
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Sep 27, 2016 6:43 AMby LucoBrasi,Try to reset your device. This won't delete your data stored on this device.
- Press and hold the Sleep/Wake button
- Press and hold on the Home button
- Keep holding both buttons until the display turns off and back on with Apple logo on it.
Alternatively, you may go to Settings - General - Reset - Reset All Settings
If this does not help, restore your device to factory settings. Note that this will erase the data from your device.
Take a look this Apple Support article: Use iTunes to restore your iPhone, iPad, or iPod to factory settings - Apple Support.
