AT&T: number@txt.att.net
T-Mobile: number@tmomail.net
Verizon: number@vtext.com
Sprint: number@messaging.sprintpcs.com or number@pm.sprint.com
Virgin Mobile: number@vmobl.com
Tracfone: number@mmst5.tracfone.com
Metro PCS: number@mymetropcs.com
Boost Mobile: number@myboostmobile.com
Cricket: number@sms.mycricket.com
Nextel: number@messaging.nextel.com
Alltel: number@message.alltel.com
Ptel: number@ptel.com
Suncom: number@tms.suncom.com
Qwest: number@qwestmp.com
U.S. Cellular: number@email.uscc.net
via Bo Tian