If it is, tap on the app to launch it, then tap Update and accept any new permissions. You can update WhatsApp on an Android phone by launching Google Play and clicking the three horizontal lines icon at the top left of the page, then choosing My apps & games and checking to see whether a WhatsApp update is available. The Documents feature should now be available to all WhatsApp users, and the most recent update for Android and iPhone (rolling out now) lets you share files other than simple PDFs. Also see: How to make video calls and group video calls on WhatsApp. Now it's possible to send any document up to 100MB for free, too.
WhatsApp is a fantastic service for letting you chat with and send picture- or video messages to your contacts for free over a data connection without using up your tariff allowances.
