Android Question Creating a unique code based on the phone's hardware or better methods?

Given that I have little experience with coding in B4A, the best way, in your opinion, is to create a unique code based on the device's hardware specifications, something like a serial number. For example, someone may suggest a time or date or may want to create a code with the help of the Internet. Suggest the safest one that is less likely to be hacked. It would be better if there was a library or class that could help.