Yes, you can use the iPhone to take the subway after binding the transportation card. The steps are as follows:

First, take iPhone7 as an example, turn on the phone, select Settings, and click Enter.

Secondly, enter the "wallet and ApplePay" option on the settings page, and click Enter.

3. Then select the option to open "Add Credit Card, Debit Card or Transportation Card".

Fourth, then choose the corresponding subway, such as "Beijing Card" to add.