Here's a thing most of us would rather not picture. Your mum is out somewhere on her own, or at home, and something has gone wrong — a fall, a funny turn, a stroke — and she can't get her words out. Someone has stopped to help. They pick up her phone to find a number for a next of kin, and it tells them nothing. Locked. Silent. No hint that she's on blood thinners, no way to reach you.
It's a small gap, but it sits at the worst possible moment. And it's worth closing, because closing it takes about five minutes and costs nothing.
The one screen anyone can see
Modern phones lock everything away behind a passcode, and quite right too. But there's one part that shows to anybody who so much as taps the screen: the lock-screen wallpaper. That picture is visible without unlocking a thing — which is usually just a nice photo of the grandchildren.
You can put that space to work. Instead of only a photo, the wallpaper can carry a few lines that a stranger, a neighbour, or an ambulance crew can read in the seconds that matter — without needing the passcode, and without knowing where anything is hidden.
What actually earns its place
A lock screen has room for very little, and someone reading it is in a hurry. So keep it to the things that change what a helper does next:
- A name. Whose phone this is.
- The one or two conditions that matter in an emergency — diabetes, epilepsy, a pacemaker, "takes warfarin". Not a full medical history; the handful of facts a paramedic would want in the first minute.
- Serious allergies.
- Who to call, and their number. This is the one most people miss, and often the most useful of all. A name and a mobile: "In an emergency call David, 07…".
Short lines, big text. If it doesn't fit and stay readable, it's too much — cut back to what a helper truly needs before anyone arrives.
Do it alongside the phone's own tools, not instead
Your parent's phone almost certainly has this built in already, and it's worth setting up too. On an iPhone it's Medical ID, inside the Health app; on most Android phones it's Emergency information in Settings. Both can be reached straight from the emergency-call screen, and both hold more than a wallpaper can — a GP, a list of medications, several contacts.
The reason to add a lock-screen picture as well is that it asks nothing of the person helping. Medical ID is the proper place a trained medic will look — but a frightened passer-by, or a grandchild, or a neighbour who's never owned an iPhone, won't know to swipe to the emergency dialler and tap "Medical ID". They'll just see the screen. Belt, and braces.
The honest bit
It's worth being plain about what this is, because a false sense of safety helps no one.
It's a prompt for help, not a shield. It doesn't stop anything from happening — it simply gives whoever finds the phone a head start. It won't replace calling 999, and it won't replace a medical-alert bracelet, which is still the fastest thing a paramedic tends to clock and doesn't need charging. Think of it as one more layer, not the whole coat.
And it isn't private. Whatever you put on a lock screen shows to anyone who picks the phone up — which is exactly the point in a crisis, but it also means this is not the place for anything you'd mind a stranger reading. Keep it to what helps, and nothing you wouldn't say out loud.
Kept in proportion, though, it's a genuinely kind thing to set up for someone who spends a lot of time on their own. The quiet reassurance isn't really for them — it's for you, two hours up the motorway, knowing that if the worst happened their phone wouldn't just sit there saying nothing.
We built a small free tool for the fiddly part, called My Emergency. You fill in a few lines — on their phone, or on your own computer and pass it across — and it makes the picture for you to set as the wallpaper. Nothing you type leaves the device; the image is made right there on the phone. Set that up, switch on their Medical ID while you're at it, and you've done in an afternoon a thing a lot of families mean to do for years.