How to surf T-Mobile without a data plan

ExtremeTech has a report about Smozzy an app for android phones which enables websurfing over sms/mms. Of course it is slow and Smozzy is based on a cheap VPS so it will not be able to service hundreds of phones. And it is only usefull for people with a unlimited sms/mms plan like T-Mobile USA. All in all it is a nice hack which also shows that pricing of sms/mms is highly overpriced comparing it to other datatraffic by gprs/3G. It is also reminds me to the use of 16 Kb D-channel from a ISDN connection which is capable of X25 datapacket switching but only meant to be used for signaling. If you were lucky you could use it between two locations as a low permanent datachannel for free. Most of the time they killed it after discovery with the message that they would restore it after paying an additional monthly fee.