# 3 Firmware

- [3.1 Login Router](/manual/3-firmware/3.1-login-router.md): Connect a phone or computer to the EZR24 router via Wi-Fi or Ethernet. And login to the router at the default router IP address 192.168.20.1.
- [3.2 System Admin](/manual/3-firmware/3.2-system-admin.md): Here are the basic system settings that should be changed on the EZR24 router.
- [3.3 Network Interfaces](/manual/3-firmware/3.3-network-interfaces.md): The network interfaces on the EZR24 router.
- [Local Networks](/manual/3-firmware/3.3-network-interfaces/local-networks.md): Configure the LAN interface to set up local intranet networks.
- [3.4 Mobile Modem](/manual/3-firmware/3.4-mobile-modem.md): Monitor status and configure APN and Protocol on the Mobile interface.
- [Mobile Protocols](/manual/3-firmware/3.4-mobile-modem/mobile-protocols.md)
- [Mobile Band Lock](/manual/3-firmware/3.4-mobile-modem/mobile-band-lock.md): In some rare conditions, such as between two cell towers, we need to lock the 4G router to work on a specific band to get a stable connection or faster speed.
- [3.5 WiFi Hotspots](/manual/3-firmware/3.5-wifi-hotspots.md): Wi-Fi hotspots have been turned on by default, and the default Wi-Fi hotspots are Cell-WiFi-xxxx-V4 and V5.
- [WiFi Relay](/manual/3-firmware/3.5-wifi-hotspots/wifi-relay.md): You can connect the EZR24 router to another Wi-Fi hotspot to get a backup Internet connection or extend the current Wi-Fi network.
- [3.6 Firmware Upgrade](/manual/3-firmware/3.6-firmware-upgrade.md): Performing the file-level backup, restore, reset, and firmware upgrade on the EZR24 router.
- [3.7 Recovery](/manual/3-firmware/3.7-recovery.md): Fix the issues on the Internet and wireless networks and rescue the router from misconfigurations.