Most of my friends chat from mobile phone. Sometimes, I also use my Android phone to chat with Facebook and Gtalk friends. Gtalk and Facebook have their own messenger for Android phones. But it becomes easy to chat with your friends, when you use one all in one messenger. I use Nimbuzz to chat with Gtalk and Facbook friends. I prefer Nimbuzz over imo.im, because I can call my Gtalk friends from Nimbuzz. But there are also other all in one messengers, that you can use on your Mobile phone. Which all in one messenger you use on your mobile phone?