Ok i'm working on a T-mobile ZTE Zmax for a friend that has TWRP Recovery on it. When I look at the partitions both the data and system partition appear to be blank. I have little experiance with ZTE phones(Lot's of experience with Android but mostly HTC and LG devices). From searching around I find posts warning against factory restore unless done through TWRP, so i'm wondering if that's what might have caused the OS to be erased and if there is any way to restore this phone. The Boot partition is fine and phone goes to a white android screen like it's about to boot the system then after a while it turns it self off.

Also I can't mount the internal sdcard through USB in TWRP. I ran the terminal command 'mount' and noticed that both the /data and /sdcard were both mounted to the same /dev/block/mmcblk0p27 <---that maybe the wrong mmcblk but I don't have the phone in hand right now and i'm not sure if i'm correct on the number. Noticed the file system was ext4 for both also which I know is wrong since sdcard has to be formatted to fat32. So I dismounted the /sdcard ran 'cat /proc/partitions' found the only fat32 formatted partition which I think was /dev/block/mmcblk0p26 so I mounted that as /sdcard and there were no errors but I still can't mount the internal sdcard through USB in TWRP.

Any help would be appreciated thank you