Gmail has recently launched a facility to SMS directly from Gmail chat
and the good thing is replies are also delivered directly to chat box.
Update: Gmail SMS chat now supports four major telecom operators Ufone, Mobilink, Warid, Telenor
SMS chat works based on credits, initially your are granted 50 credits
- sending SMS cost 1 credit
- receiving SMS increase credit by 5
- if credit go down to zero it will get reset after 24 hours
Happy SMSing !