I've had whatsapp messenger on my blackberry for a year now. A friend of mine recommended me to get this application as she told me it was brilliant!
What shall I say about whatsapp messenger? Well, its fast, free, great! You can send pictures, videos, voicenotes, locations etc.
The way you upload the pictures is if your pictures are already in your phone device. You would also do the same thing if you wanted to upload a video too.
Basically its free text+(videos, voicenotes) messaging to all business phones (iphone, blackberry, androids etc)
What's great about it is that you can text all you want, send pictures, videos and still you would not waste a single penny.
Whatsapp messenger is what I would call a unique messenger. Unlike yahoo and msn live, you do not have to keep logging in to access what has been going on while you were away. No, all you have to do is access the app and there you go. You are ready to talk.
You can also send broadcasts and write a status to let people know whether you are busy, at home, at work, out shopphing etc.
You can use it at home, out with friends or family or if you haven't any remaining credits or texts than whatsapp would come handy.
I'd recommend it to anyone. Thumbs up to whatsapp messenger!