Here is the most popular, proven fix for the Samsung ML-2160 firmware issue. Around 2018-2020, Samsung (now owned by HP) pushed a silent automatic firmware update (version V3.00.01.35 or higher). This update contains "Dynamic Security" – a polite way of saying it rejects any toner that isn't an expensive, official Samsung cartridge.
Downgrade to V3.00.01.21 , buy the cheap $15 toner cartridges, and keep printing for another five years. -Most popular- samsung ml 2160 fix firmware
The Most Popular Samsung ML-2160 Fix: Solving Firmware & “Invalid Cartridge” Errors Here is the most popular, proven fix for
Until it doesn’t.
Your printer isn't broken. It’s a victim of a designed to block compatible cartridges. Here is the most popular
Disclaimer: This post is for educational purposes. Using non-OEM toner may have risks. Proceed at your own discretion.