Once connected, it will prompt you the code so you can unlock it. One of them should do the trick! If your software didn't ask you a code, please download the software from the link above. Mobile Partner software or any other associated software will ask you the network restriction code. Simply insert a SIM cart from another network. Check your bill or the modem itself if you couldn't find it. In most models, modem's box has a sticker with the IMEI printed on it.
