If you're getting a message stating "Could not activate cellular data network: You are not subscribed to a cellular data service" then you are not alone. I recently got off the phone with a Sprint tech who determined that i have iOS 7 beta and stated that many users are having a similar issue with the beta versions. He stated that it is not Apple's fault but something on their side. He said that the users who have called in about the issue will have it fixed in a couple hours max. He already called me back to check on my status and said would call again in an hour. So in the end Sprint's network baffles me…even though they are attempting to fix it. I'll let you guys know an update after I get a phone call from Sprint. Note that I have already tried ##UPDATE# and Reset all network settings. So this will not help but won't help to try. Edit: No surprise but Sprint said they will call me back tomorrow after following up with me.