Home Configuring MTN internet on mobile device Huawei Huawei Cameroon Internet MTN Cameroon Nexttel Orange Cameroon Cracking an Orange/Mtn (Huawei) modem-Update Firmware
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If your modem did not ask for an unlock code after inserting a different sim card in it then you need to;
When the link opens, click on your device name. E.g E303, E303C or any other device name.
Click on download the firmware
When the download is complete, install the Firmware and follow the step by step instructions. If at any moment you are asked for a password, type in the Flashcode you generated above . If it does not work, try this one n1122n
Let me know if this worked for you.