You'll probably need internet to do so, only PC is not enough. Check this site http://www.afreesms.com/freesms/ . You'll be able to send SMS worldwide.
You can send free sms by airtel mobile by changing the message center code.
You can send free sms to mobile phones using online websites. Below mentioned website allows free international SMS
Hi You Can Send Free Sms To Pakistan on All Networks You Can Visat These Sites.And Also You Can Send Free Sms From All Over The Worldifun.pk/sms/send-free-sms.aspx
Try using Free SMS services such as www.sendafreesms.co.uk
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YES,You can send FREE SMS without any information about you.That is : www.seasms.comByNadeer.Kwww.nadeerk.webs.com
How can you send SMS to your mobile telephone from your PC in Lithuania?
There are two best websites for free sms from net to Mobile are sms4smile urdumaza Enjoy free sms service.
www.sendafreesms.co.uk - try this site