oppo f7 is change can not factory reset so this firmware will done all problem dead boot, password lock, pattern lock, this firmware is official CPH1819 oppo F7 fix firmware size is 3.5Gb max i will free give for your problem and profit your have service have error you can comment down box.
now i will give 3 firmware another version depenning your phone
Download : CPH1819_11_A.07_180401
Download Firmware (3.5GB)CPH1819_11_A.08_180411_7
Download Firmware (3.6GB)
Download Firmware (3.9GB)