Google Chat on Mobile Phone

Can we do a google chat , yahoo chat , and many more by using only GPRS ?....

we can say yes to the above question by looking into this Nimbuzz application...
step:1 open google in u r phone
step:2 type Nimbuzz and go for the search.
step:3 select u r mobile type like w810i..
step:4 get the jar Ex: director.jar
step:5 intsall and then start the application.