I would suggest trying (stop when one works...)
1) Boot into factory mode & wipe the cache
2) Boot into factory mode and do factory reset (wipes ALL data)
3) Use KIES to re-install the earlier ROM
4) If sound remains an issue get cheap PAYG to keep you going while you send it back...
You could try removing the lid to see whether there is anything obvious, perhaps one of the electrolytic capacitors has had it (may notice fluid leaked onto PCB), you could try replacing... just a thought...
You could try removing the lid to see whether there is anything obvious, perhaps one of the electrolytic capacitors has had it (may notice fluid leaked onto PCB), you could try replacing... just a thought...
My S2 is SIM free, I updated f/w using ODIN
http://reviews.cnet.co.uk/mobile-phones/how-to-install-ice-cream-sandwich-on-your-samsung-galaxy-s2-50006766/
My S2 is SIM free, I did the update manually (via ODIN)
http://reviews.cnet.co.uk/mobile-phones/how-to-install-ice-cream-sandwich-on-your-samsung-galaxy-s2-50006766/
Just upgraded to ICS, be aware your icons on the home pages get removed (the programmes are still present in the Applications sections - you need to copy the icons/widgets over again...)
Neither... I downloaded a program ("ODIN") and installed an update manually (you don't need to root the phone)
Can't recall the link off hand, if you're interested I'll try to dig it out.