Updated September 2026: this 2021 post told the story of replacing my wife's broken phone screen with a cheap duplicate during the Covid lockdown, and the problems that followed. I have rewritten it as a guide to choosing between original and duplicate screen replacements.
My wife's phone screen broke shortly before the lockdown restrictions in 2021. With service centres hard to reach, I went to a local shop. The technician offered a cheap replacement and warned upfront that the fingerprint sensor would stop working with it. We agreed. Soon the screen was flickering and locking on its own, and when our child dropped the phone a few weeks later, it broke again.
That experience is common enough that it is worth explaining what a duplicate screen actually is.
What is a duplicate or copy screen?
It is an aftermarket display built by a third party to fit your phone, not the part the manufacturer uses. Quality ranges widely. Many phones today use OLED panels, and the cheapest replacements for them are often LCD panels instead, which is where most of the problems start.
Why does the fingerprint sensor stop working?
Many phones read your fingerprint through the screen, using a sensor that needs light to pass through an OLED panel. An LCD replacement has a backlight layer that blocks it, so the in-display fingerprint sensor cannot work. That is what our technician was warning us about. Phones with a fingerprint sensor on the side or back are not affected in the same way.
What other problems are common?
- Flicker and ghost touches: lower-quality touch layers can register taps you did not make or lock the screen unexpectedly, as ours did.
- Worse picture: duller colours, lower brightness outdoors and thicker borders.
- Battery drain: LCD panels generally draw more power than the OLED they replace.
- Fragility: cheaper glass and fitting can crack more easily.
- Warranty and resale: a non-genuine part usually ends any remaining warranty and lowers resale value.
When does a duplicate screen make sense?
On an old phone you plan to replace soon, or a backup device, where saving money matters more than features. Ask the shop plainly whether the part is OLED or LCD, whether fingerprint and touch will work fully, and what warranty they give on the part.
When should you pay for an original?
On any phone you intend to keep for more than a few months, and always on phones with an in-display fingerprint sensor. Get a quote from the brand's authorised service centre first. If the original screen costs close to the phone's current value, that is the point to compare it with buying a new phone rather than repairing.
After two broken screens in quick succession, the cheap option had cost us a fingerprint sensor, weeks of flicker and a second repair. For a phone in daily use, the original part is usually the cheaper choice over its life.