Have problem about BB 8520 loading 70 %, Now follow some step to repairs.
How To Repair BB 8520 loading 70 % :
Clean and heat main board i f not fixed reinstall software 100% will be solve with out changing ic.
RUN JL CMDER, WIPE PHONE. THEN LATEST FILE AVAILABLE FLASH IT Are U Android USER ? GET MONEY by DOWNLOAD whaff and SUBMIT CODE : AS31417