It is technically impossible to häçk a router to generate free internet if it is disconnected from Converge or PLDT because the router is merely a device that distributes a signal and does not create the connection itself. You still need an active subscription and a physical line from an Internet Service Provider (ISP) since the router cannot bypass the authentication servers of Converge or PLDT that verify your account status. Even if you modify the router settings, the ISP will block the connection immediately if the account is disconnected or if the credentials do not match their records. Buying a second-hand router from people roaming your subdivision only gives you the hardware itself and does not include any free internet access or active account. There is also a security risk when buying used routers because the previous owner might have installed malicious firmware or left vulnerable settings that could compromise your data. To ensure safety, you should always perform a factory reset and update the firmware immediately after purchasing a used unit. The only legitimate way to get internet is to subscribe to a plan and have a technician activate the line on your specific address.