Default help..spreadtrum s4 8825ea

hi..i have and spreadtrum phone s4 clone..with the chipset sp8825ea.
and my phone goes crazy eventually...the settings menu appears..phone vibrate alone...but i cant find the software of my phone and i cant make a backup with the tutorial for the sc6820..
any ideas how can i make a backup and reflash the firmware..
this is the compilation and info of the phone.
ANDROID VERSION: 4.2.2
COMPILATION: H508_B5_C-ZONE-S4_W13.08.06_V0.3.6_20140404

ANY HELP PLEASE...