Verizon: 10digitphonenumber@vtext.com
Former AT&T customers: 10digitphonenumber@mmode.com
Sprint: 10digitphonenumber@messaging.sprintpcs.com
T-Mobile: 10digitphonenumber@tmomail.net
Nextel: 10digitphonenumber@messaging.nextel.com
Cingular: 10digitphonenumber@cingularme.com
Virgin Mobile: 10digitphonenumber@vmobl.com
Alltel: 10digitphonenumber@alltelmessage.com OR
10digitphonenumber@message.alltel.com
CellularOne: 10digitphonenumber@mobile.celloneusa.com
Omnipoint: 10digitphonenumber@omnipointpcs.com
Qwest: 10digitphonenumber@qwestmp.com
Useful, no? You can also send a text message via google
ErikPersson.com 