Cheaper call from mobile

Fring

надежные site.

Freeware

The client program that enables you to use Skype, ICQ, MSN Messenger, Yahoo Messenger, TWITTER and SIP on mobile.

So you can call via Skype ... to exchange text messages free, paying only for the traffic of the Internet.

Fring supports Symbian S60, iPhone/iPod, Android, Windows Mobile, MeeGo, Linux, J2ME, and the appropriate operating system.

Not all models of mobile are supported. It is this question to find out Russian blog.