Hi there and welcome
Can you tell me the model of the phone please?
this is the Tab 3. The only way to remove the lock is to reset the Tablet Ian. This will remove all your data from it and return it to new, but you cannot avoid this, it is the whole reason for the lock.
To do the reset, please do the following
Once done you can then set it up again and use it
If you have any problems, or would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.
that is the main one on the front at the bottom, the physical button
please follow this video as it will show you the steps and may be easier to follow
remember it needs to start by being off (completely)