Ubiquiti UniFi routers and gateways, tested with ThingSIM.

Setting up a ThingSIM in the UniFi Network application

The APN goes in UniFi Devices → the cellular unit → Settings. Copy it from the SIM's page in the ThingSIM portal; there is no username or password.

1. Activate the SIM in the ThingSIM portal and insert it in the unit (the 5G Max takes a nano SIM, or use eSIM).
2. Connect the unit to a PoE port and adopt it in the UniFi Network application.
3. Choose how it is used, as backup internet over the LAN or, on the 5G Max and 5G Backup, as a primary WAN on WAN1 or WAN2.
4. Open UniFi Devices, select the unit and open its settings. Enter the APN from the portal as a custom APN and allow roaming.
5. Set a data limit and warning to match your ThingSIM plan.
6. The device panel then shows signal and connection state.