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Help Sim card Problem

naashi

Lurker
Oct 12, 2012
1
0
Hey guys I m using xperia neo v. it was running Android OS, v2.3.4 (Gingerbread). my friend took it and just installed v4.0.
Now I am in big trouble, Because My sim card is not working any more and v4.0 is just bad. I want to come back on older version. plz help me out to do that.
I am waiting
 

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