Model 102 Tablet Rom image?

ROM image that I'm trying to find for a Model 102 Tablet. This is all new and strange to me I have but little experience on android, so thanks again for your assistance.

The Motherboard: m102_v.1.2

Model M102
Processor: Allwinner quadcore A33
Android version 4.4.2
Firmware V2.0
Kernel 3.4.39
Kernel version lxl@newqihao # 19
Monday Sep 15 15:01:21 CST 2014
Build No: astar_m102 eng 4.4.2 KVT49L 20140915 test_keys
It has an 8723BS wifi chip

I can get the tablet to run "sort of" with A33_U102_U1021C.201401013.img from "mytabletguru.com/allwinner-a33-firmware-and-tool/ " but there is no wifi. I have tried to modify the system configuration file for the U102 image file, so as to try to turn on the wifi chip, but without success. Any help appreciated.
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Flashing factory image without erasing user data?

hi guys, i have a big question about flashing a new factory image without erasing userdata

i like to root my nexus player (6.0.1) and because of that im forced to flash a new factory each time i want to update my nexus player because i cant update using OTA (to get root on 6.0 we use a modified system and OTA doesnt work if there is any modified system or recovery)

i have a 250 gb local disk i use with nexus player as internal memory so i can download (and i do) all the free grames and apps from play store, and, of course, i play those games.

i install sideload apps too.

All of this to do it all over again each time a new update comes is a big pain,

is there a way to avoid erasing userdata when i flash a factory image?
or is there a way to backup all my games, apps and info? (like titanium backup, i didnt test it because i didnt realised of that idea before i erased everything)

Help me guys please! XDA rocks!!

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