I (hopefully) just need to be pointed in the right direction.
I know nothing about IM client options, but I'm hoping to use an IM app to send messages to contacts' phone numbers in order to avoid being charged for text messages.
Everything I've found in my research so far seems to provide plenty of info for people already using any of the IM clients available, but I'm starting from scratch.
I assume that it's possible to send/receive messages via IM instead of my phone's SMS, but which apps are best for this?