Default NFC Question (pics included)

Hey there, (Album here)

Just moved into a new apartment building which makes me use this small tag and access control pad to access the lobby and lifts.

My question is that can I and my room mate use the NFC on our phones (I have a HTC One, he has a S3 4G) or my NFC ring that I'm getting in a couple of weeks instead of this small tag?

Seems quite a hassle to bring out this small tag out everytime I need to get up and down.