another piece of info
your product code is written beneath ur battery on the phone so just change the product code and do a software update again from the nokia site to get your old firmware back
also as some people mentioned that warranty is on the hardware so there shouldnt be any problems,but im not too sure of that,well 1 thing noticed is that n70 scrolling through pictures and loading is much faster on the me and ofcourse the bump up on OS version on n70 makes it better too.