Xperia Go Jelly Bean Upgrade : Problem on phone calls

[YounesHm]

Hi there .... I am facing the same problem of phone calls ... and I will be really glade if you Could tell me what to do .... 

[_alexdon_]

You can,but it is not sure you will still have warranty after that.

[YounesHm]

I don't have warrenty at all ! 😛 how to do that please !!

[_alexdon_]

http://talk.sonymobile.com/t5/Xperia-S-SL-acro-S/How-to-manually-update-root-downgrade-2012-Xperias/...

If this does not help,check on XDA for other tutorial.

[YounesHm]

thank you Sir !

[_alexdon_]

Anytime.Keep us updated.