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I don't know if anyone else is having this problem but a lot of the time when i video record on my Xperia S the video is in sync then it lags and the audio goes out of sync with the video. This is very frustrating, please help!!!
Solved! Go to Solution.
anytime
Update Service (SUS)
http://www.sonymobile.com/gb/tools/update-service/
http://www-support-downloads.sonymobile.com/Software%20Downloads/Update_Service_Setup-2.11.12.5.exe
http://software.sonymobile.com/install_packs/Update_Service_Setup-2.12.12.41.exe
for future reference
Alternatives on How to backup Xperias
If you look at the videos in your computer, is the recorded movie out of sync as well, or is it just when playing them via the phone?
No it's also out of sync on my computer. The video lags but the audio keeps playing so it goes out of sync.
are you using another camera app? you might want to backup everything and repair your phone with SUS or PCC
No I'm using the default camera app. Ahh i was afraid it might come to this. Anyway thanks for your help. 
anytime
Update Service (SUS)
http://www.sonymobile.com/gb/tools/update-service/
http://www-support-downloads.sonymobile.com/Software%20Downloads/Update_Service_Setup-2.11.12.5.exe
http://software.sonymobile.com/install_packs/Update_Service_Setup-2.12.12.41.exe
for future reference
Alternatives on How to backup Xperias