Un restablecimiento parcial (apagar y luego encender el dispositivo):
is similar to restarting a desktop computer and is one of the first steps in troubleshooting a device.
won't affect data on the device.
Press and hold the Power button (located on the back) until the Phone options screen appears then release.
If device is unresponsive, press and hold the Power button until the device powers off (approximately 10 seconds) then release.
From the Phone options screen, tap Power off and restart.