Asus VivoTab RT 3G - Manual (Page 23)

TF600TG 
Using the USB dongle
The USB dongle allows you to connect a USB device to your Tablet PC. With the
bundled USB dongle inserted, you can connect and access the contents of your
flash drives or external HDDs, connect an external USB speaker, use a mouse or a
keyboard and other USB devices.
To use the USB dongle:
A. Connect the bundled USB dongle’s connector to your Tablet PC’s dock port.
B. Insert the USB device to the USB dongle’s USB port.
IMPORTANT! Ensure that the 36-pin USB dongle is fully inserted to your Tablet PC.
Installing a micro SIM card
Before you can make calls or send text messages using your Tablet PC, you need
to install a micro SIM (Subscriber Identity Module) card.
To install a micro SIM card:
A. Insert the bundled micro SIM card tray eject pin to the micro SIM card tray
eject hole to remove the micro SIM card tray.