Call Free From Your Mobile Using GPRS.

If you are using gprs on your mobile phone, than it will become easy
to call through voip, voip means "voice over internet protocol". In
short it means that you can call on any mobile phone which is gprs
activated, and that is through internet(it's nothing but calling
through internet).
Fring is a mobile internet community and communication service that
allows you and your friends to connect, share experiences and enhance
their online communities/communications together.
Download and start enjoying the features available through Fring. You
can connect to all IM buddies mobile like fring, Skype, MSN, Yahoo,
AIM, Gtalk etc. You can also do free calls
live chat instead of SMS
call landlines and regular cellular contacts using SkypeOut or SIP.
You can also view your friends' profiles enjoy mobile internet via
fring Add-on applications
view call history invite friends to fring send & receive files choose
incoming call and message tones
auto-roam in and out of WiFi hotspots. Create a fringAdd-on minifring™
is a lite version of fring, developed specifically for JAVA ME devices
which do not support voice over IP calling. Minifring has been
developed in response to JAVA ME users asking for a way to join the
community of fring. Minifring delivers the same user experience as
fring. Download and connect to all IM buddies mobile like fring,
Skype, MSN, Yahoo, AIM, Gtalk etc. Just visit www.fring.com/ through
your mobile browser and the site will recognize your mobile phone,
downloading and use of Fring is free. If you are using windows mobile
phone like HTC Touch, Samsung etc. Than directly head to www.fring.com/wml
and download Fring.