How can you send a text message from a computer to sprint phone and have the recipient reply to your att phone?

To send a text message from a computer to a Sprint phone and receive replies on your AT&T phone, you can use an email-to-SMS gateway. Simply compose an email to the recipient's phone number using the format [number]@messaging.sprintpcs.com (e.g., 1234567890@messaging.sprintpcs.com). The recipient can then reply to your message, and their response will be directed to your AT&T phone as a text message. Make sure to check if the recipient's phone supports SMS replies.