This disconnects your internet service until you reconfigure the ISP settings. If your ISP uses PPPoE or VLAN tags, you will need to re-enter those credentials. Call your ISP first if you are unsure.
For devices like the ZTE MF833, MF920, or MF971R: zte password reset
If you tried admin/admin and it failed, check the sticker on the bottom of your router. Many Internet Service Providers (ISPs) customize ZTE firmware. The sticker will list the specific "Device Access Code" or "Admin Password" unique to your unit. This disconnects your internet service until you reconfigure
Keep your admin passwords in a physical notebook or a secure digital password manager. For devices like the ZTE MF833, MF920, or
A factory reset erases your Wi-Fi name (SSID), custom password, and ISP settings, returning the device to its out-of-the-box state.
If you have forgotten your ZTE phone’s screen lock password, PIN, or pattern, the solution depends on your Android version and whether you are logged into a Google account.