Got TMS4 added today also. Had to call 3 times, here's what happened:
1st rep seemed to be aware of people calling in about TMS4 so he put me on hold for good 5 minutes (maybe was talking to the manager?), came back and told me:
1.) I'm not eligible because I don't have a premier account - what the freak?
I told him I do have a premier account then he replied:
2.) My premier account is not eligible for that discount code.
So at this point it was pretty clear he wasn't going to budge so I said bye and hung up.
2nd rep was a total 'witch with a b in front' and told me that iPhones are not eligible for discounts as soon as I mentioned the word "iPhone." I then asked her how my coworkers with iPhones got the discount added and she said, "I don't know, maybe they have additional lines?"

*click*
3rd rep, now this guy sounded really nice just from how he answered the phone so I knew luck was on my side. I told him that "a company rep gave me a feature code to add which would replace my existing txt plan." He asked me what it was, I told him TMS4, he said he will try to add it, then got back to me in less than a minute to tell me that he successfully added it on there (YESSS). He also mentioned that the first two months are pro-rated (pay $8.99 x 2 months in advance in my upcoming bill) but I should be charged monthly after that. Then I confirmed with him that the previous txt plan was removed ($5 for 200 txts), thanked him, and hung up.
MISSION ACCOMPLISHED!

I was able to see that TMS4 was indeed added and the original txt plan removed via online account management. Now I'm going to be paying $69.99 for the minutes/data plan + $8.99 for 1500 txts with 15% discount on my bill totaling about $70 per month. What a deal for an iPhone!
