If this fails, you can unlock your tablet using these steps:
1. On the unlock screen, enter your unlock pattern
2. After five attempts you'll be asked to wait for 30 seconds. Tap OK
3. If your phone display goes off, tap the power button and unlock your screen.
4. ap Forgot pattern? If you haven't set up a Google account you won't get this option, instead you'll need to reset your tablet
5. Enter the username and password of your Google account, tap Sign in
6. You'll be asked to create a new screen unlock pattern. If you don't want one, tap Cancel
To reset your tablet:
1. Turn your tablet off
2. Hold the volume down key
3. Turn your tablet on
Using the volume down key, highlight Wipe data/factory reset and press the power key to select
5. Press the volume up key
The reset is now complete.
Note: Resetting your tablet will clear all the data stored, data that's stored on your SIM is safe.