my coolpad is rooted, i used a system app unninstaller from the play store to remove some bloatware, my sister got ahold of it and somehow managed to delete music, flext9, and various other things. i tried to recover them (backups) and on my sd card theres only a backup for the flext9 and it wont flash back over...i have found a stock rom backup over on coolpadroot.webs.com i placed it on my sd card, went to recovery and attempted to flash it and it said invalid signature. am i doing something wrong? could someone please help me lol