How do I write and send a text message from my T-Mobile phone?

To locate information about texting from your T-Mobile phone, perform the following steps:

1. Log in to your My T-Mobile account.
2. Under Connect and Share click Send a text message. 
3. Fill in the To and From fields and write your message in the Message box.
NOTE: The message you write can be up to 129 characters in length.
4. Click the Send button to send the message.