ZTE Grand X Plus - Manual (Page 33)

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Before turning on encryption, prepare as follows:
●
Set a lock screen PIN or password.
●
Charge the battery.
●
Keep the phone connected to the charger.
●
Schedule an hour or more for the encryption process: you
must not interrupt it or you will lose some or all of your data.
When you're ready to turn on encryption:
1. Touch the Home Key > > Settings > Security >
Encrypt phone.
2. Read the information about encryption carefully.
The Encrypt phone button is dimmed if your battery is not
charged or your phone's not plugged in.
If you change your mind about encrypting your phone, touch
the Back Key .
WARNING!
If you interrupt the encryption process, you will lose data.
3. Touch Encrypt phone.
4. Enter your lock screen PIN or password and touch Next.
5. Touch Encrypt phone again.
The encryption process starts. Encryption can take an hour or
more, during which time your phone may restart several times.
When encryption is completed, you're prompted to enter your
PIN or password.
Subsequently, you must enter your PIN or password each time
you power on your phone in order to decrypt it.