When the Apple iPhone was first launched, there was no application that allowed inter-iPhone-messaging. Then came Ping! which stirred up the community somewhat, but was not wildly accepted. Then came WhatsApp that was heaps better and received widespread acceptance.
Today, it is hailed as one of the first apps an iPhone user MUST install, as it allows you to message your friends for free. As their tagline goes, “SMS is so 2008″.
However, WhatsApp was limited to just the iPhone and that was rather, errr… limiting? But not anymore. It has now …

WhatsApp is a great application that is useful for instant messaging from iPhone-to-iPhone for FREE. It is akin to the Blackberry Messenger, and is a rival application to the much famed Ping, which picked up a huge following due to the $0 price tag when it first launched. (They have since launched Ping Lite which is still free).
However, WhatsApp seemingly does not support quite a number of countries, but there is a legitimate way around it. Their website quotes in their FAQ:

What countries do you support?
Most of them! We took …