Emergency Communications: How to Stay Connected When Networks Fail

When a major emergency hits, the first thing people reach for is their phone. It is also the first thing that fails. Mobile networks overload within minutes of a major incident. Cell towers lose power. Wi-Fi goes down. In the 2017 Manchester Arena incident, network congestion was so severe that casualties waited hours for emergency calls to get through. Your phone is useful. It is not reliable when it matters most.

This guide covers how UK families can build a communications plan that works when networks fail — what gear to have, what alternatives exist, and how to make sure your family can stay in touch when the usual methods do not work.

Why Phone Networks Fail in Emergencies

Most people assume that if there is an emergency, they will be able to call for help. The reality is different.

• Cell tower overload: In a major incident, thousands of people try to call at the same time. Mobile networks have finite capacity. During the 7/7 London bombings, network congestion prevented calls for hours. The same happened during Storm Eowyn in 2025 — millions of people trying to call at once, and the networks simply could not cope.
• Power dependency: Mobile phone masts require power to operate. They have backup batteries, but those typically last 8-24 hours. In a prolonged power cut affecting a wide area, cell towers go dark. Your phone shows signal, but you cannot make a call.
• Physical damage: Storms, flooding, and earthquakes can damage the physical network infrastructure. In flood-prone areas, local exchanges and cable connections are vulnerable.
• Wi-Fi dependence: Many people assume they can use internet-based calling (WhatsApp, FaceTime) when mobile networks are down. But if your broadband relies on the same local infrastructure that is damaged — or if you lose power to your router — internet calls fail too.

The solution is not to rely on a single communication method. It is to have alternatives that do not depend on the same infrastructure.

Alternative Communication Methods That Actually Work

Battery-Powered and Hand-Crank Radios

A battery-powered DAB/FM radio is the most reliable broadcast communication tool available. When everything else fails, BBC Radio 4 (93.5 FM in London, or your local BBC station) continues broadcasting. The BBC has a legal obligation to maintain emergency broadcast capacity. During the 2021 national emergency alert test, radio was the fallback method for anyone who did not receive the mobile alert.

Hand-crank radios are even better — they generate their own power. A good hand-crank radio can also charge a phone via USB in an emergency. This is not a luxury item. It is the centrepiece of any emergency communications plan.

→ GridReady Emergency Comms Kit includes a hand-crank radio with USB phone charging.

Two-Way Radios (Walkie Talkies)

For short-range family communication, two-way radios are the most practical solution. They operate on radio frequencies independent of mobile networks. They do not require any infrastructure — you do not need a mast, a signal, or internet. As long as two radios are on the same frequency and within range, they work.

UK users should look for PMR446 (Personal Mobile Radio) radios — these are license-free in the UK and Europe, legal to use without any paperwork, and operate on eight predefined frequencies. The range is typically 1-2 kilometres in urban areas, 5-10 kilometres in open ground. They cost between £20 and £80 for a pair.

The key limitation is range. They will not connect you to emergency services. But for coordinating within a neighbourhood or within a family scattered across a small town, they are invaluable.

Mesh Networks

For more advanced users, mesh network devices — such as those using the LoRa protocol — allow devices to relay messages between each other, extending range without any infrastructure. The goTenna and Hiro 2 devices work with your phone to create ad-hoc networks. They are more expensive (£150+ per unit) but are increasingly used by UK emergency preparedness communities.

For most families, radios and a hand-crank radio cover the practical use cases. Mesh networks are worth considering if you live in a rural area or want advanced capability.

Building Your Family Communications Plan

A communications plan is simple. It answers three questions: How do we contact each other? How do we get official information? What do we do if we cannot communicate at all?

Step 1: Agree an Out-of-Area Contact

Pick one person outside your local area — a relative in a different city, a friend in another region. When an emergency happens, everyone calls this person to check in. It sounds counterintuitive, but out-of-area phone lines are often clearer than local ones during local emergencies. The networks are less congested, and your contact can relay messages between family members who cannot reach each other directly.

Step 2: Designate Meeting Points

If phones are down and family members are in different locations, where do you go? Agree a primary and a backup meeting point. The primary should be close to home — a landmark everyone knows. The backup should be further away, in case your immediate area is affected. Make sure every family member knows both locations.

Step 3: Know How to Text When Calls Fail

Text messages (SMS) route differently to voice calls and often get through when voice calls do not. In a congested network, send a text first. Texts are smaller data packets and have lower priority on the network, so they are more likely to get through when things are busy.

Step 4: Keep Physical Copies of Key Information

A printed card in your wallet or emergency kit with key numbers is not old-fashioned. It is backup planning. Include: the out-of-area contact number, 105 (UK power cuts), local council emergency number, and any medical information relevant to your household. Phones run out of battery. Printed numbers do not.

Step 5: Set Up Official Alert Systems

The UK has two main official alert systems:

• Met Office weather warnings: Sign up at metoffice.gov.uk for your region. They send email and push notifications for Yellow, Amber, and Red warnings.
• UK Government emergency alerts: The system was tested in 2023. Most mobile phones can receive these alerts. Make sure notifications are enabled on your phone.

The Communications Checklist

Print this and keep it in your emergency kit. Run through it when you hear about an incoming storm, flood warning, or other emergency.

What Gear Is Worth the Money

Not everything labelled as "emergency" is worth buying. Here is what actually works:

• Hand-crank radio with USB charging: £30-50. This is the single most valuable communications purchase. It receives BBC Radio 4, generates its own power, and can charge a phone in an emergency.
• PMR446 two-way radios: £20-40 for a pair. For family coordination within 1-2km, these are unbeatable. No licence, no subscription, works immediately.
• Power bank (10,000mAh+): £15-25. Keeps phones running for multiple charges. Rechargeable via USB. Check charge level every six months.
• Battery-powered DAB radio: £15-30. A backup to the hand-crank radio. DAB provides more station variety, including local BBC stations.

Expensive "emergency" gadgets with built-in batteries that cannot be replaced, satellite communicators that require subscriptions, or solar panels that take days to charge a phone are not worth it for most families. The basics above cover 95% of emergency scenarios.

Stay Connected When It Counts

The best communications plan is one you set up before you need it. The radio that sits in a drawer for three years and then does not work when you need it is not a backup. Test your gear once a year. Replace batteries. Make sure everyone in the household knows how to use the radios.

Phone networks are reliable most of the time. "Most of the time" is not good enough when someone's safety depends on it. A £50 hand-crank radio and a pair of £25 walkie talkies give you a communications system that does not depend on any infrastructure at all.