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Security > Encrypt phone
.
2. Read the information about encryption carefully.
The
Encrypt phone
button is dimmed if your battery's 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 and displays its progress.
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, to decrypt it.