What is my passcode?
When I am asked for a passcode, where can I find one? What is a passcode? Is it always the same or is it different every time like the code used for 2-step verification?
The passcode is the code you use to unlock your phone when you turn it on. In most cases where you are asked for a passcode, it can be that one. However, in some apps, you may be asked to set up a passcode so that could be different.