T-Mobile will only allow external email to be accessed through its MDA line of Windows-based PDAs, or its Blackberry devices, which involve an additional fee to Blackberry's owners RIM.
T-Mobile customers who choose many of the other email-capable phones on the market are not told by the company they will not be able to access email, however. Instead, they are repeatedly advised to contact either the phone manufacturer or their ISP to recover settings that will enable them to gain access to their email.
When those companies advise customers that it is an issue with T-Mobile and not themselves, they return to T-Mobile customer services - only to receive the same advice from the service provider.
In a recorded conversation we held with one T-Mobile representative, we were told five times that it was an issue with the phone manufacturer, or our ISP.