Help with Firmware for s07 MTCC-KLD6

[Edrocc]

Hello. Sorry for the bad english.
I bought a Android Radio Second Hand. I wanted to Update it because the Wifi didnt worked.
After trying it wont work. After a second try it worked again, but it looks some kind of Zoomed in.
Befor i tryed my luck, i look everythink up in the settings.


Modell-Nr.:
S07

S/N:
f60103391705080407e00a5133504b52

Prozessor:
ARM Cortex-A9 @1.6GHz (x4)

MCU-Version:
MTCC-KLD6-V2.91

Android Version:
5.1.1

Kernel-Version:
3.0.101+
root@chun #8
Mon Mar 28 17:08:16 CST 2016

Build-Nummer:
rk3188-userdebug 28042016. 17:25:07


I dont know what Resolution it is. i tried 1024x800 (i think)



I hope you can help me.
Thank you