After twelve years and over 220,000 repairs, we have a fairly good idea of how phones actually die. It is rarely dramatic. The accidents that fill our bench are ordinary, repeatable and - usually - preventable. Here is what really breaks phones, what each accident does inside the device, and which habits are worth changing.
Quick answer: the big four are drops onto hard ground, sitting on a phone in a back pocket, liquid (far more often rain, sweat and steam than a dropped-in-the-toilet moment), and worn charging ports. Screen damage is the visible result; bent frames, board corrosion and battery stress are the damage you cannot see.
Drops - it is the surface, not the height
The classic. What decides the outcome is less how far the phone fell and more what it landed on and how it hit. Pocket height onto carpet is usually survivable; half that height onto a corner of the phone against tile or concrete concentrates the whole impact into a few square millimetres of glass. That is why one phone survives a flight of stairs and another cracks falling off a sofa arm.
A drop can damage more than the glass: the display panel underneath, the frame, and occasionally solder joints on the board. If the picture is fine but touch has become unreliable after a fall, the problem is often deeper than the visible crack - our guide on glass versus display damage explains how to tell.
The back pocket
Phones are thin, and thin things do not like being sat on. A phone in a back pocket takes your body weight every time you sit down, flexing slightly against a hard seat edge. The screen can crack without a single drop, and repeated flexing can bend the frame - which then stresses the display, the battery and the board seals. Frames rarely bend back cleanly. Front pocket, bag, or out of the pocket before you sit.
Liquid - rarely the toilet, usually the everyday
The liquid damage we see is mostly mundane: rain on a phone used outdoors, a glass knocked over on a desk, sweat during workouts, steam from a bathroom shelf. Water-resistance ratings help, but they are tested on new, undamaged devices - a phone with a cracked screen, an ageing seal or a previous repair does not have laboratory-grade protection, whatever the spec sheet said on launch day.
Corrosion is the quiet part: a phone can work normally for days or weeks after getting wet, then fail as residue eats at the board. If your phone has been properly wet, switching it off and getting it inspected beats waiting to see - the steps are in our water-damage guide.
Charging ports and cheap cables
The most under-appreciated killer. Pocket lint compacts into the port until the cable stops clicking home; people then wiggle the plug, which strains the port’s solder connections on the board. Add bargain-bin cables - which fit loosely and put uneven pressure on the pins - and you get the charging faults that fill our bench every week. Most “broken port” symptoms start as debris, which is a quick fix; left alone, they can end as board-level repairs.
Heat
Car dashboards in summer, phones left in direct sun, charging under a pillow. Heat is the battery’s enemy: it accelerates wear, and in bad cases causes swelling that pushes the screen out of the frame. If your phone regularly gets too hot to hold comfortably, the cause is worth finding - it is rarely nothing.
Children, pets and other forces of nature
We repair a steady stream of phones that met a toddler’s enthusiasm, a dog’s jaws or the inside of a washing machine. There is no perfect defence, but two habits help: a proper case with raised edges while the phone is on loan to small hands, and a fixed spot where the phone lives at home - most washing-machine phones went in with the laundry because they lived in a trouser pocket.
What prevention is actually worth doing
- A decent case with raised edges and a screen protector - unglamorous, and the single best value in this list.
- Front pocket or bag, never the back pocket you sit on.
- Buy certified cables; replace frayed ones instead of persevering.
- Keep the phone off the car dashboard and away from steam.
- Treat water-resistance as a safety margin, not a feature to test.
When the accident has already happened
Back up first if the phone still works. Then have the damage assessed before it grows: cracks spread, corrosion advances and loose ports strain the board. A diagnostic tells you what actually failed and what fixing it costs - and if a repair is not worth it, we will say so.
