SGH-E315 with t-mobile you will have to make your own wap settings

enter this in your phone, *#87927# you will then get a screen saying settings voicestream, voicestream, gprs preferred, profile4 info, profile5 info...go down to profile4 info and you will then get another screen, this is where it all comes...type this is for the following...

Profile name...waptunnel
Homepage URL...http://wap.crjt.net
Security...non-secure
Bearer...data
IP address...24.3.27.144
Login name...guest
Password...password
Dial-up number 3604692000
Data call type...Analog

your all done...exit out and connect to t-zones or just start sending ringtones to your phone by e-mail like this yournumber@tmomail.net you should be receving them at pic messages...GOOD LUCK.

ps...login in to you t-zones with the new settings will charge you by the minute so watch out...to change them again to its original settings just go the the setting screen and choose the original settings and there no harm done...

if the code does not work try this one...
Profile name...waptunnel
Homepage URL...http://wap.yahoo.com
Security...non-secure
Bearer...data
IP address...12.25.203.11
Login name...guest
Password...password
Dial-up number 3604692000
Data call type...Analog

Default:

Profile name...GPRS Preferred
Homepage URL...http://wap.myvoicestream.com
Security...non-secure
Bearer...GPRS
IP address...216.155.165.50
Login name...anonymous
Password...
APN...wap.voicestream.com