Fibre to the flat or a 5G router: the home-office decision one window can flip

Both products sell the same promise - "broadband without the old ADSL shame" - and both deliver it right up until the moment your workday is inside the connection. The desk's rule for choosing between fixed fibre and a 5G router for a Lagos home office is embarrassingly unglamorous: pick whichever one you can prove is up at the times you actually work, and design for the one that can be down when you cannot.

Where each one fails, because they fail differently

Fibre to the flat fails politely and rarely: the cut that takes it out is usually a roadwork trench three streets away, it takes days, and until then the performance is symmetric - upload genuinely matches download, which is the only spec that matters for video calls, cloud drives and sending raw footage. A 5G router fails often and locally: the cell mast serves your whole area, so your evening slowdown is the neighbours' slowdown, shared; a storm, a mast power problem or a congested event near you moves your latency in ways your plan says nothing about. One is a utility with an outage ledger; the other is radio, and radio keeps its own schedule.

The work test, in the order it should be done

• Upload first: run the video call and the cloud sync at once. Fibre shrugs; most 5G routers will hold the call but choke the sync unless you schedule it, because mobile networks throttle uplink long before downlink feels slow.
• Latency under load: ping your meeting platform's region at 8pm, not 4am. The night-time number is the marketing number; the 8pm number is your Tuesday.
• The window test: a 5G router beside the window that faces the mast is a different product than the same box inside a cupboard behind foil-backed glass. Move it before you switch providers - this fixes an ungodly share of "bad network" complaints at zero cost.
• Install reality: fibre wants a technician, a routing decision through your compound, sometimes weeks; 5G wants a SIM, a socket and no permission from anyone. If you rent or move, that asymmetry is half the decision.

The verdict the two ISPs will not print

For a household whose income depends on the call staying up: fibre as the primary, proven on a Monday morning with a hard speed test, and a phone on recent mobile data as the failover with a tethering habit drilled - not the second router's, the phone's, because a phone's network stack negotiates congestion differently and, frankly, you carry your failover out of the compound with you. The 5G router as primary is a genuinely good product for people whose work survives 8pm jitter: solo contributors, no heavy uplink, no fixed appointment times. And if the landlord will not trench, the question was never which is faster - it is which you are allowed to install.