Android Dead Pixel — All Brands
Most modern Android phones use AMOLED or OLED displays. Several brands include a hidden diagnostic mode — select your brand or use the universal browser test.
Android Dead Pixel Test
Secret diagnostic codes for Samsung, Xiaomi, Sony + browser test for all brands
Google Pixel
Pixel 8, 8 Pro, 9, 9 Pro, 10 Pro — test, warranty, and trade-in
OnePlus
OnePlus dead pixel test and warranty guide
Xiaomi
Xiaomi and Xiaomi Pad dead pixel testing with hardware diagnostic
AMOLED Dead Pixel Guide
How AMOLED dead pixels differ from LCD — and what can be fixed
Android Secret Diagnostic Codes (Quick Reference)
| Brand | Diagnostic Method |
|---|---|
| Samsung | Dial *#0*# in Phone app → tap Red / Green / Blue / Black / White |
| Xiaomi | Settings → About Phone → tap Kernel Version 5× → Hardware tests → Display |
| Sony Xperia | Dial *#*#7378423#*#* → Service tests → Display |
| OnePlus / Pixel | No built-in code — use this browser test |
| All others | Use this browser test at deadpixelphone.pro/test/ |