Here's how you can turn on encryption on your Android Jelly Bean device. 1. Go to Settings. 2. Go to Encryption. 3. Click the Encrypt button to encrypt your data. Encrypting your data make take an hour or more, and you should have your Android device plugged in while the encrypting is happening. Do not interrupt the encryption process or you might lose some or all of your data.
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50 Android Jelly Bean tips, tricks and hints | Tech Radar