There are literally ICQ-compatible apps for android, as well as any of those other services which have bothered to keep their servers running. Mobile devices add nothing to server requirements.
They do. Without push notifications you are not getting instant messaging when the app is in the background. At that point you could just use email instead.
There are literally ICQ-compatible apps for android, as well as any of those other services which have bothered to keep their servers running. Mobile devices add nothing to server requirements.
They do. Without push notifications you are not getting instant messaging when the app is in the background. At that point you could just use email instead.