U can upgrade it nicely machan! Only thing is u have 2 find a working crack or not blacklisted serial key (Its hard, but i found one!). But once u find it u can easily upgrade it!! And Kaspersky is da best!
Repost! But the problem comes when u ask the service provider to block the handset. They will not simply block it 4 da sake u told them. U have 2 get a Police report to confirm that this was your phone! Time consuming but useful!