really easy look for the estao version basically all you do is download the two files, download SE pc companion hit repair, once the repairs done delete the two biggest files in the program data folder and replace them with the downloaded and done you have 16 and any other firmware sony brings out day and date full ill try add a link in a second

http://www.esato.com/board/viewtopic.php?topic=195467

i followed that works great really easy took about 20 mins, remember to backup contacts etc theres apps that can backup everything but most of them are paid so just have a look around

Bhal