[T-Mobile, Samsung Galaxy SIII] AntikytheraTech:
I will start by saying I am a

very

happy Samsung Galaxy S III owner and an

extremely

un-happy Sprint customer (due to the lack of 4G and my paying for 4G for the past 3 years). I have started looking at terminating my contract with Sprint and doing a prepaid service like StraightTalk, that is until I recently read on Android Central that T-Mobile now has unlimited prepaid service. I spent some time tonight at a T-mobile store and the sales rep told me some things I would like to run past you fine people who may no more than this guy (I know he works for them, but they will also say anything to get you to buy what they want you to buy... er at least Sprint does). So here are the things he told me that I would like your input on.

1) The highest prepaid plan is unlimited talk, text and data at $70/month. However, your HSPA+ data ends after 5GB of data and beyond that amount, your data speeds will be throttled to "go so slow that web pages will time-out before they load, yes I am serious" (I am quoting the sales rep here)

2) "T-mobile has separate towers that are specific for pre-paid customers. They are fewer and more far between then our contract towers and as such, your coverage area is decreased and the data speeds you can achieve on HSPA+ (up to 5GB) is slower. You cannot access the towers that our contracted customers use, these towers cover more area and with greater bandwidth"

3) "With pre-paid you cannot roam. Period." He told me that with contract service you have truly, un-throttled, uncapped data on any T-mobile tower and truly unlimited roaming (voice, text and data) on any AT&T tower.​

All in all, the sales rep was quite intent on stating how terrible and useless the prepaid service is, and that I can have all the amazing, truly unlimited, un-throttled, roam-anywhere, zoom-bang-wow service at the exact same cost of a contract plan ($70/month - since I am bringing my own device - I have an unlocked GSII Skyrocket). I just don't know if this guy is lying to me about some of these things in order to make me go contract or if he really is telling all truth here. After all, it is better for T-Mobile if I guarantee I pay them the cost of service for 2 years (or a contract cancellation fee) as opposed to having me on a string for only 1 month at which time I can leave at no cost.

I believe the no roaming part (what I mean to say, is that I can see how this can and would be possible) but I really cannot see how they have separate towers for the pre-paid and contract customers as they all operate on the same GSM frequencies (to my knowledge at least). This is only my idle speculation of course, I am hoping some of you can confirm/dispel some if not all of these statements I heard today and help me make an informed decision on where I go next with my service provider.

As a final note, I should explain to you that the truly unlimited and un-throttled data is important to me as I stream almost all my content and upload (via DropBox) a high volume of photos, all in addition to the usual stuff that eats up data (lots of email, video chatting, VoIP, MMS, etc). I currently use between 6-8GB of Sprint data per month. That is saying something considering how awfully slow their data is in my area (Denver, CO). So I anticipate needing even more than that once I am on a network with greater speeds as I naturally will be using it even more.

Thanks for all your input!