Factory Unlocked iPhone 4 MMS Problem

So I bought a Factory Unlocked iPhone 4 from my local apple store the other day and I am on T-Mobile. Everything is working perfectly...except the MMS function of the phone.

Basically, I can send picture messages to anyone and I can send regular SMS. But I cannot receive MMS. My wife is on T-Mobile as well and she has tried to send me almost 20 pictures of various and random things and every, single time, I get the same message.

I have contacted Apple about this issue and they instructed me to talk to T-Mobile about it. Heres what T-Mobile had to say:

"T-Mobile Rep.: From the main menu, tap Settings.

Tap General.

Tap Network.

Customer: ok

T-Mobile Rep.: Tap Cellular Data Network.

Customer: ok

T-Mobile Rep.: Enter the following information under the MMS section.

APN: epc.tmobile.com (iphone 2G: wap.voicestream.com)

Username:

Password:

MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc

MMS Proxy:

MMS Max Message Size:

MMS UA Prof URL:

Customer: ok

T-Mobile Rep.: Press the Home button to return to the Main Menu.

Then turn the phone off and then back on.

Customer: what about the cellular data section? I dont have to put anything in there?

Customer: ok its restarting

T-Mobile Rep.: Okay.

T-Mobile Rep.: Now, just as a disclaimer, we cannot guarantee that it will work.

Customer: ok

Customer: ok the phone is back on

T-Mobile Rep.: Alright, go ahead and test it out.

Customer: ok hang on a sec

T-Mobile Rep.: Okay.

Customer: It didnt work. I got the same message that I've been getting. "The media content was not included due to a picture resolution or message size restriction"

T-Mobile Rep.: It sounds like the picture settings may need to be changed to accept larger picture files.

Customer: how do i do that?

T-Mobile Rep.: That, we do not have the steps for.

Customer: hmmm ok"

So I guess at this point, I either wait to hear back from Apple and see if they have a solution or I just live without MMS receiving abilities. But I figured I would post this question here as well to see if anyone else has had this odd issue or not.

Thanks

Kyle