Share your experience!
Can the new system update ie 6.1.A.2.55 done successfully in Xperia S? I get an error as "Sony update engine could not be installed (error 0x803d0020)"
Use this to update your phone
SUS ( Sony Update Service) ... download and install it on pc and follow the on-screen instructions
http://www.sonymobile.com/global-en/tools/update-service/
________________________________________________________________