Remove the back cover
Turn the back of your router towards you.
Take hold of the bottom right corner of the back cover and remove it.
Take hold of the bottom right corner of the back cover and remove it.
Insert your SIM
Place your SIM as illustrated in the SIM holder.
Slide your SIM into the holder.
Insert battery
Place the battery in your router (left side first), matching the battery contacts with the router contacts, and press the battery into place.
Replace the back cover
Place the back cover on your router and press it into place.