: Users provide the device's 15-digit IMEI number to an official carrier or a third-party service like DirectUnlocks ExpressUnlocks Insert a SIM card from a different network provider.

Modified firmware is used when standard codes fail or if you need features like , Band Locking , or IMEI modification .

: Includes IPv4/IPv6 dual stack, VPN client support (L2TP/PPTP), and firewall/NAT configuration.