Send SMS Using Your GMail Account
If you are familiar with Chikka then that explains how Gmail Free SMS works. It’s like sending an instant message directly to a mobile phone for free. On the other hand standard network charges apply when a mobile user reply to the message.
Well aside from the Philippine’s network providers you could also send free SMS to 20 other countries. See the complete countries here.
To send a SMS using your Gmail Account all you need is to type the recipient number on the new SMS box in Gmail’s chat window located on the left-side of the screen and just click send.
For more details about this service you could visit: Google.com