Your SIM must be inserted before you can use your modem.
Remove the cover
Turn the front of your modem towards you.
Slide the cover downwards and remove it.
Place your SIM as illustrated next to the SIM holder.
Slide your SIM into the SIM holder.
Place the cover on your modem with a small opening at the top and slide the cover upwards.
*Please refer to the Huawei website for more information or further support.*