Huawei E3531 is the modem (dongle) provided in Sri Lanka which is very old model. Here we will guide you to unlock the modem in order to use it with other network provided sim cards. We are using DC unlock as its the simplest method of unlocking Huawei modems.
Launch DC-Unlocker client
Open Server tab, enter your username and password that you received after credits purchase. Click "Check login". (you can buy credits here www.dc-unlocker.com/buy). If DC-Unlocker/Vygis/Rocker/Infinity dongle is connected, only click " Check login "
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