Dialog's video calling comes with a conferencing facility that allows users in six different locations to talk.
Dialog says is 3G network now covers, greater Colombo, Kandy, Galle, Kurunegala, Anuradhapura, Nuwara Eliya, Moneragala, Ampara, Trincomalee and Jaffna.
Jaffna is cut off from the rest of the island by a stretch of land held by Tamil Tiger guerillas.
Residents of the peninsular, who have relatives abroad use international calling services extensively.
Dialog said in launched 3G and HSPA (high speed packet access) services in the Mannipai area of Jaffna through its 530th 3G base station.
"With the introduction of 3G and HSPA the customers in Mannipai will be empowered with the very latest in mobile communications and broadband technology on par with the most advanced 3G networks globally," Dialog chief Hans Wijayasuriya said.
"We pioneered mobile communications in Jaffna in 2002, and have enjoyed the loyal patronage of Jaffna consumers ever since.
"Likewise D