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You should update/flash your phone's software/firmware. To do so, you need to have your USB data cable with you (
That comes with the phone). If you have it then download
this application, install and Run it. Then follow the on screen instructions. That will update your phones firmware. Its a good practice to keep your Cellphone out of bugs.
Note: This will bring your phone as "
OUT OF THE BOX" Condition.
If you have any Confusion, questions or issues regarding your problem do tell me.
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Concerned, Nooh