email to phonenumber@txt.att.net / messaging.sprintpcs.com / etc... once you receive the text, a reply will (should? works for most major carriers - att on my i

email to phonenumber@txt.att.net / messaging.sprintpcs.com / etc... once you receive the text, a reply will (should? works for most major carriers - att on my iphone tested) send the message back to the original email address.