Ok, so I've been having issues with the Nexus S 4g and ICS (both rooted and unrooted). For the last 2 weeks mms messages have not worked. I reverted back to Gingerbread 2.3.7, rooted with stock rom, and my mms works fine. But now I get constant requests for system upgrade to ICS. Is there any way to block these requests? I'd just as well stay on Gingerbread at this point so I can send/receive pics but it's asking me to upgrade every 10 minutes.