If you are a SPG member now you have one more reason to download the SPG app - the SPG keyless.
To use SPG keyless you first need to download the app and register your phone as a SPG keyless phone:
The register process takes seconds to go through:
The new door lock in SPG hotels looks like this. (This is my room door of Sheraton Mission Valley in San Diego)
However my iPhone sometimes mistaken think this door is an Apple pay device and always show me apple pay when I tapped.😝
Look like you need to let the front desk to enable the keyless even you have a registered phone with you if you are not checked in with the SPG keyless previous enabled.
This commercial for SPG keyless is pretty fun: