How to send a FREE sms to any national/international number without the help of third party websites

source: asginformationtechnologies.com

source : theweek.com

How cool will it be, if you could send an email to a phone number?
Just imagine, you want to send an important information to your parents / friends. What you do ? Whatsapp? FB ? SMS ? Call ?
If the recipient doesn't have immediate access to internet, the only option is to SMS or call. And if they are not picking the call, then the only option left is to send an SMS; which will cost you. But, there is another better way, you can email this info to their mobile number.

We can send a mail to any phone and its FREE for many phone numbers (based on your service provider). When so many Indians are famous for the "missed calls", this option certainly beats that.

In the current market, many telecoms operators have 'free email to SMS gateways' which we can use to forward simple text emails to a mobile phone. In simple terms, you can drop an email to any phone number using the recipient's service provider's SMS Gateway.

How? Its simple. Just drop an email to <10 digit="" number="" phone="">@ServiceProvidersGateway

You just need to know your friend's phone number and the carrier (Eg. Airtel, Sprint) to start emailing to their mobile phone.
The table below lists a few free 'email to SMS gateways' for different carriers. You can use this as a quick reference for India, USA and International mobile numbers.

Eg:  
Airtel (Karnataka, India) number@airtelkk.com
919845n@airtelkk.com Karnataka Airtel
919895n@airtelkerala.com Kerala Airtel
9842n@airsms.com Tamil Nadu Aircel

T-Mobile [10-digit phone number]@tmomail.net
Example: 1234567890@tmomail.net

Verizon [10-digit phone number]@vtext.com
Example: 1234567890@vtext.com

Sprint PCS  [10-digit phone number]@messaging.sprintpcs.com
Example: 1234567890@messaging.sprintpcs.com

AT&T    [10-digit phone number]@txt.att.net
Example: 1234567890@txt.att.net

I have tested this for Sprint (US number) and for Airtel Karnataka (Indian number).

I sometimes use this method to inform myself about any new mails coming to my Gmail. I set my Google settings to forward any incoming mail to another email id. Of course, the other email id is my phone number@airtelkk.com. So, whenever I am travelling and I can't check my mails, I get an SMS with the subject and a brief message content to my phone !! Even you can be contacted any time, provided your phone has a signal.

Beware, your wife might misuse this for sending shopping lists, but on the plus side this costs nothing if she has internet access!!!

Ref Sites: 
        http://www.makeuseof.com/tag/email-to-sms/
        http://martinfitzpatrick.name/article/using-email-to-sms-gateways-to-send-free-sms