How to Text a Cell Phone from your Computer

Simple. Don't bother with any interface that advertises to send texts. Just use your regular email application and send the message to <10 digit cell phone number>@<provider>

If the recipient's provider is AT&T, use: "@txt.att.net"
If Verizon , use : "@vtext.com"
If Sprint , use : "@messaging.sprintpcs.com"
If T-Mobile , use : "@tmomail.net"
If Alltel , use : "@message.alltel.com"

The length of the email should be kept to fewer than 140 characters.

So, for example,  if the person you are texting has service with Verizon and the phone number is 555-123-4567 , type “5551234567@vtext.com.”

If the person you are texting has service with AT&T, address the text message to the ten digit cellular phone number then "@txt.att.net"
If the person you are texting has service with Sprint, address the text message to the ten digit cellular phone number then "@messaging.sprintpcs.com"
If the person you are texting has service with T-Mobile, address the text message to the ten digit cellular phone number then "@tmomail.net"
If the person you are texting has service with Alltel, address the text message to the ten digit cellular phone number then "@message.alltel.com"

If you don’t know the provider, just send the text to all five addresses.