I got the number from a thread about getting swirlymms to work.
The context leads me to believe that it is tier 2, as those would be the techs with the ability to enable a WAP push and do that other stuff mentioned in the quote, as I understand it.
First off, call 888.892.9760. These are tier level reps who know what they're doing. Second off, make sure you have the rep enable WAP push (There are 2 places in Snooper for them to make the change.) Next, have the rep change your iphone texting plan to a normal non-iphone text plan. (costs the same). Lastly, have them resend your ota's (over-the-air activation) and reset your vlr's (clears the registry). Power cycle your phone and you should be good to go.