What are the best practices for a professional IoT cellular installation?
Professional UK IoT cellular installation best practices include: testing signal with the actual router and antenna before commissioning; sweeping all available UK operators to select the best primary and failover network; performing per-port MIMO analysis; configuring the router with correct APN, band lock and ping watchdog; scanning the router WAN IP for exposed ports; and producing a signed commissioning certificate with all signal data recorded.
Pre-installation checklist
- Confirm device cellular technology requirements (4G LTE, NB-IoT, 5G, RedCap)
- Verify UK operator coverage at site via network coverage maps and CellMapper
- Select appropriate antenna type for site geometry (directional vs omni)
- Plan antenna mounting position for maximum height and line of sight
- Calculate cable run length and select appropriate cable type to minimise loss
- Confirm SIM APN and provisioning requirements with the SIM provider
- For multi-site rollouts: test a representative sample site before ordering SIMs at scale
Commissioning checklist
- Mount antenna in final position before taking any signal readings
- Insert roaming or multi-network SIM for operator sweep
- Run CellTester multi-operator sweep: RSRP, RSRQ, SINR, download and upload per operator
- Aim directional antenna using live RSRP mode — lock off at measured peak
- Check MIMO port balance — delta above 10 dB requires investigation before proceeding
- Configure APN, primary PLMN, failover PLMN and band lock based on sweep results
- Configure ping watchdog for automatic connection recovery
- Run security scan — confirm no management ports exposed on public WAN IP
- Download commissioning certificate
Common commissioning failures and how to avoid them
| Failure mode | Cause | How CellTester catches it |
|---|---|---|
| Wrong operator selected | First registration used, not best operator | Multi-operator sweep ranks all UK operators |
| MIMO port fault | Bad connector, crossed cables, open circuit | Per-port RSRP analysis flags delta above 10 dB |
| APN misconfiguration | Modem registers but no data passes | APN validation against PLMN database |
| Antenna pointing error | Installed without live feedback | Live RSRP aim mode confirms optimal bearing |
| Security exposure | Default credentials, open management port | WAN IP security scan pre-certificate |
| No commissioning record | Nothing documented at install | PDF certificate with all data records baseline |