About text messages
To send and receive text messages, your wireless service provider must set up your wireless service plan for text messaging. Depending on your wireless service provider, this feature might not be supported.
Depending on the typing input language that you use to type your text messages, your messages might display to your recipients differently than you expect.
Depending on your wireless service provider, you might also be able to send and receive the following media files in text messages: .jpg, .gif, .wbmp, .midi, .vcf (vCard), .ics (iCalendar), .avi, .mpg, or .mov.
If you have more than one phone number associated with your BlackBerry smartphone, your smartphone sends text messages using the first phone number that appears in the My Number field in the Phone application.
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