should your phone on 0412, 0516 or any other version, then we have to update it by flash tool， and before flash, we have to make sense that what is your phone version, as both ZP980 & C2 has a B VERSION And Normal version, if you found your phone in the battery slot, there is a mark" B" or " FC", then it is B version, it can not flash the normal version rom, or phone can not power on. following is the picture show.
the PCI are differnece in these two version. if flash the wrong rom will cause the phone can not power on.
After the flash, c2 will show 12gb memory as zp980, but after you reset the storage( setting-storage-erase phone storage), it will be around 2.1gb, so there is no 16gb C2, DO NOT BE CHEAT BY dishonest seller！watch your money！
Following are rom for zp980 c2 0521 rom
1. Black screen while stable
2. Green display camera
3. Enhance 3g signal
4. System optimization
5. Support OTA
Download Link: zopo zp980 c2 B version 0521 rom
Version B Mark:
Download link: zopo zp980 c2 normal version