If the web interface rejects the firmware, you may need a TFTP server software (like Tftpd64) or a USB-to-TTL serial adapter (UART) for hardware flashing.

Once the router boots into the new unlocked firmware, you will likely need to configure it from scratch to get back online. 1. Reconfiguring Your Internet Connection

While continuing to hold the Reset button, press the power button to turn the router back on.

Stock ISP firmware is designed for simplicity and remote provider control, not performance. Upgrading to a custom or unlocked firmware variant offers several distinct advantages:

Then buy a $30 OpenWrt-compatible router for your main routing needs.