Been using this in our communications center for a few years now. If you are on email, simply address it to (the phone number) @ (put in the carriers text set up). Such as5092356187@vtext.com, tmomail.net, txt.att.net and so on. Sometime is works best to put short messages in...
Are you always sending SMS to your friend’s cellphone from your cellphone? Did you know that you can SMS to someone using email? This list is extremely helpful, if you are outside US and would like to SMS someone in US, you can just send it as an email.