1. What is WhatsApp? WhatsApp Text - Simple, reliable messaging
WhatsApp uses your phone's Internet connection to send messages so you can avoid SMS fees. Messages are encrypted.
WhatsApp Calling - Speak freely
WhatsApp Calling uses your phone's Internet connection, instead of your mobile plan's voice minutes, so you don't have to worry about expensive calling charges.

2. WhatsApp has a group chat function – you can keep in touch with the groups of people that matter the most, eg your whole team or immediate co-workers.
With group chats, you can share messages, photos, and videos with up to 256 people at once. You can also name your group, mute or customize notifications.

3. Getting started!
Everyone in the group will need to download the WhatsApp App. On installation it creates a user account using one’s phone number as the username.
Setting up a WhatsApp group; someone needs to be the group administrator.
The group admin will then:
Create new group
Add group name/photo
Tap arrow/next

4. Start adding participants
Start adding participants. Make sure your participants are in your Contacts (People) before adding. WhatsApp software, once installed, automatically compares all the phone numbers from the device’s address book with its central database of WhatsApp users to automatically add contacts to the users WhatsApp contacts list.
4. Type name here and then add from your contacts, or
click on add participants.
5. Once you have added all participants tap on the tick.
6. Start messaging! Send your group a test message.

5. WhatsApp - things to think about
WhatsApp is a great way for agile or disparate teams to re-create the ‘social chatter’, or office banter that can be missing when a team is not based in the same physical location. WhatsApp can be a useful tool for trying to capture the intangible benefits that come from casual conversations over the boiling kettle or on the way to the printer or canteen.
WhatsApp is a free way to transmit GIF (picture) files.
WhatsApp is a ‘broadcast messaging’ tool – ie one message to many, and can help an agile or virtual team gain a sense of belonging.
WhatsApp instant messenger is end to end encrypted. In an emergency you could send more sensitive information via this route.