WHAT IS THE GUIDE FOR NOKIA AND OPPO IMEI REPAIR? I AM BUY CREDIT BUT ITS NOT WORK

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I M WAITING ALREADY 5 DAYS......CUSTOMER ARE WAITING FOR FIVE DAYS ? AND UFI TAKING OUR MONEY INSTANT AND SLEED LONG TIME THEN THEY ARE GIVE SOLOUATION ?????????????????

THEY DONT GIVE ANY SUPPORT .B-CUSE THERE 4TH YERA ANNEVERSERY UPDATE FOR CUSTOMER EYE WASH AND JUST TAKING MONEY FORM CUSTOMER POCKET.................​