Why do subway parkour always log in with a mobile phone number?

It's more convenient to log in with your mobile phone number for subway parkour.

1, at this stage, there are two ways to log in the subway parkour game. The first way is to log in with your mobile phone number, enter your mobile phone number and then verify it by SMS.

2. The second is to log in with a login name and password, and you must register an account in the fun game network to log in.