- Maximum message length: 160 characters (including email address, subject line, and body of the message). The subject line is limited to 16 characters and the body of the message can be no longer than 140 characters.
- What happens to longer messages: Unknown
Cost per message: 10 cents per message. Messages to non-U.S. recipients cost 15 cents to send; sending messages while you are outside the U.S. costs 35 cents. T-Mobile's "Messaging Value Bundles" are cheaper if you send hundreds of SMS messages per month; they start at $4.99 for 400 messages/month and go up to $14.99 for unlimited messages.
For more information: T-Mobile Text Messaging FAQ
Sending email to your phone: Use the address format [10-digit phone number]@tmomail.net