How do I change devices?

Hi all.

I’m quite sure I read somewhere that you can access your account from different platform/devices (but not at the same time of course).

Can anyone explain that function?
(I’m looking at a new phone soon and not wanting to lose my account.)

If you’ve connected your account to Facebook, when you install it on the new phone and link it again, it’ll pull your info and you can pick up where you left off.