Learn how to add, share and manage contacts through the import and exporting features on your Firefox OS phone.
This article describes how to set the date and time on Firefox OS.
WhatsApp isn't directly available on Firefox OS, but you can still use a WhatsApp client on your device or chat with friends using Facebook or LINE.
Bluetooth lets you exchange data over a short distance. Learn how to enable it on your Firefox OS device so you can easily share files with others.