You can do one of 3 things. See if there any updates for you phone. You can take your phone to Tmobile. If one is near you,you can also take it to a Micro Soft store,or email them,and u can google the problem. One last thought,not trying to spend your money,but it just might be time to buy a new phone. You can get good used or brand new Nokia 925 from either Ebay or
Amazon for $130-250.