Porting to Lenovo S939 from Ubtel Q1 stockrom posted bt aaland here> http://www.needrom.com/mobile/ubtel-q1-rom-stock-root/
Why Karisma? Because it comes with 4 themes built-in for you to choose what suit your charisma 
Changelog:-
MultiLanguage
Rooted
Gapps
Both sim 3G
Default write to external sdcard
Everything seems working fine so far
INSTRUCTIONS:
1)Download zip file and copy to sd
2)Reboot to CWM/CT Recovery and do a full wipe
a)Wipe data/factory reset
b)Wipe cache partition
c)Mount and storage
d)Format data
e)Format system
f)Format cache
g)Back to Advanced and wipe dalvik cache
3)Install zip from sdcard
4)Choose zip from sdcard>find and select that zip file
5)Reboot system now
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Credits:
aaland
SoCr@Te