I have a 3gs 32 that we jailbroke and unlocked and now it keeps losing its Wi-Fi connection. When I say losing I mean I can connect to it and then later in the day it will lose it and won't be able to even find the network till I reset the network settings. Then I can find and connect to it till the next time it loses it.
As far as MMS messages go, I was sending them just fine all day and night yesterday and now it won't send or recieve them. I have the camera icon next to the text bar and can attach a picture but the send process fails.
1st thing you have to do is get rid of blacksn0w.....I was going to uninstall it.....but the 1st thing I tried was re-installing it......so go to your blackra1n app....re-install blacksn0w(that fixed mine)..if not: uninstall blacksnow and reload it thru Rock or Cydia..main thing is you have to get rid of blacksn0w and redo it..thru what-ever method...GLTA