Apologies if this is old news here, but I noticed since the latest Curve update it suggested I add Curve as the default wallet app. Sure enough, NFC payments work perfectly now (at least in the UK).
This is a huge benefit to me as I was already a curve customer and desperately missed using my phone for contactless payments.
Hope others have the same experience!
If only I could get Google Wallet working, and I can use my phone as my car key also!