Ok, here's my deal... I'm with AT&T and I cancelled my data plan (because I use wi-fi everywhere I go anyway) and turned off my 3G and told them to put a data block on it. And to ensure that they don't detect me still using the iPhone (so I don't get charged crazy data usage), I got Edge turned off too by installing the fake apn profile. My phone is a 3gs on 3.1.3 and is Spirit jailbroken, and I tried looking EVERYWHERE online to see how I can get mms and visual voicemail. Does anybody know? ANYONE AT ALL??? I couldn't find an app for my particular phone/firmware on Cydia... I would be sooooo grateful to anyone who can help! I've been going without it for like 3 weeks and it's killing me!