Hello i have a onda v971 and its becoming a nightmare for me after i updated to Jb first it was google store server error now its black app screen with no apps visible or setting option. I tried to re-flash but all i get is the blue reboot that does nothing. I tried the sd card factory update but all i get is the re-boot screen please help i loved my tablet before the update but i'm close to smashing it on the wall. Help anyone