Modifying the ZTE F601 firmware is an advanced procedure that carries a high risk of "bricking" (permanently disabling) the device. ZXHN F601 User Manual GPON ONT - Wifimag.ro

Legacy versions of the F601 suffer from known vulnerabilities, including hardcoded credentials, telnet exploits, and web interface flaws. Patched community firmware often closes these security backdoors.

: Some ISP configurations force specific VLAN tags. Custom firmware lets you manipulate or strip these tags freely.

Modifying the F601 is a high-risk procedure that can "brick" the device if not done correctly. Partition Dumping