It means check codes for Samsung will not work in any other brand like Sony, HTC, Nokia, etc. These codes are unique and specific to the manufacturer. One common secret code is *#06#, which displays the device's IMEI (International Mobile Equipment Identity), (Mobile Equipment Identifier), and serial number.
There are many secret codes for Samsung Galaxy devices, which are usually combinations of numbers and symbols that can be entered via the phone dialer to access hidden features or information. Part 1: What is the Secret Code (Samsung Galaxy Secret Code) and How To Use Them?
