Custom firmware unlocks the hidden SIP/VoIP menus, allowing you to configure third-party Internet telephony providers rather than relying solely on your ISP's configuration.

Flashing a router carries a risk of bricking the device. Prepare the following before proceeding:

Enter the default administrator credentials (these vary by region and ISP): admin | Password: admin Username: telecomadmin | Password: admintelecom Username: multieuser | Password: multieuser Click Login . Phase 3: Flashing the Firmware Binary