I have updated to ice cream sandwich for almost a month now and i have been experiencing signal loss many times already I did full reset one time and still happened, I also did normal reset and still the same. I been losing more or less 35% of my network signal every full charge. I never experienced that on my previous phone which was a galaxy sl. So somehow its not a network problem. Been getting delayed messages and sent messages because of signal drops. and is the default wallpaper on xperia s static? the one in xperia u is moving or somewhat live.