After the update, I got promoted to login my Samsung account again. Once I logged in, I received an email from Samsung, saying thanks for purchasing and registering a new Samsung Galaxy s10. Then I found out my phone now has a new IMEI. For years I thought it's tied to the physical device just like Mac addresses on NICs. Is anyone experiencing this?
First, check in your device's Settings if your IMEI has changed or not.
IMEIs and MAC addresses are allocated to individual devices indeed, but they aren't tied per say. It is illegal but one can actually generate a new IMEI and allocate it to a device to circumvent, say, a blacklisting. Of course I'm not going to tell you how because it is illegal.
MAC addresses can be regenerated at will and this isn't illegal. It's in fact a great privacy measure.
Almost certainly a changed IMEI would affect the warranty - I've never ever heard of any OTA spontaneously change the IMEI... ever - IMEI is the digital serial number of the device & it appears to be every bit of illegal. 🐧