Instructions
Open your DSi's browser.
Go to your email host's web site and log in to your email account.
Compose a new message and put the person's proper address in the "To" line, which will depend on the recipient's service provider. Email-Unlimited.com has a listing of mobile phone email addresses. For example, a Qwest phone number would have the address "[email protected]", whereas a Verizon number would have the address "[email protected]".
Type your message in the body and hit "send," and the message will be sent directly to the person's phone as a text message.