So go ahead, press *#0*# on your old Corby, tap the "Red" button to turn the screen crimson, and smile at how simple—and mysterious—phones used to be.
The article is written in Turkish (as per the keyword context) to target the specific user base of this popular feature phone from the late 2000s. SAMSUNG S3650 Corby Uzerinde Gizli Kodlar Nasil...