SOLVED
Hey guys,
I'm still stuck with the old 4.1.2 firmware and I didn't want to update it to 12.1.A.1.205 cuz many folks have reported that VoIP apps such as "Viber" do not work on the new firmware (Viber is one of the most popular apps in Iran and over 90% of Android users have it on their phones alongside with WhatsApp and Tango, hence people use these softwares regularly) now what I hear about the older updates such as 201 is that they are full of bugs and issues. So I'm not sure if sony developers want to come up with a patch for solving the Viber issue or not, it's sad that we have to refrain from updating the firmware just because of the Viber issue in 205 firmware. I understand that Sony developers worked pretty hard in order to resolve the problems that existed in older firmwares but I request them to solve the issue with Viber ASAP.
Best Regards,
Amir from Iran 
and from me using 4.1.1.0 Viber is working flawlessly calls messages everything, plus i never had problems with skype so now that the phone is snappy again viber working i can peacefully wait for kit kat 
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