When a phone says ‘accessory not supported’ or similar, the cause is almost always one of a handful of things — most fixable without buying new hardware.
- This usually indicates a data or power negotiation failure, not necessarily a fake or damaged charger
- Debris in the charging port is one of the most common causes, especially on phones carried in pockets
- Try a different cable first — cable failure is more common than charger failure in this specific error
Quick check
Isolate the variable: swap the cable, then the outlet, then the charger itself, one at a time, before concluding the device is at fault.