Cant sent picture mail or recive any media on my phone

I don't know about T-Mobile but the settings for AT&T are as follows if they help at all.

WAP

***First Step***
1.Main menu --> Select Services
3.Select Data Account --> Select GPRS
5.Select the first entry
6.Edit the account name to Media Net
7.Edit APN to wap.cingular (lowercase)
8.Edit Username to [email protected] (UPPERCASE)
9.Edit Password to CINGULAR1 (UPPERCASE)
10.Edit Auth Type. to Secure
11. Save

Select Back --> Select Back

***Second Step***

Select WAP
1.Select Settings --> Edit Profile
3.Select the first entry --> Edit Profile
5.edit the name to whatever you would like
6.Edit Homepage to http://device.home
7.Edit Data Account to Media Net
8.Edit Connection type to HTTP
9.The IP address is 066.209.011.032 and the port number is 8080
10.Edit Username to [email protected]
11.Edit Password to CINGULAR1
Select back or done
Select Activate Account

MMS

Select Messages --> MMS --> Message Settings
Select Server Profile
Select the first entry
Select Edit Profile
Edit Rename Profile to whatever name you would like
Edit Home Page to http://mmsc.cingular.com
Edit Data Account name to Media Net
Edit Connection Type to HTTP the IP address is 066.209.011.032 and the port is 8080
Edit the Username to [email protected] (UPPERCASE)
Edit the Password to CINGULAR1 (UPPERCASE)

Select Done or Save
Make sure to activate the profile and you are good.