Curve Pay does not seem to work at all on 3.5. it gets as far as the “Securing your information” step but when I go to set it as my preferred wallet, but fails with the following message;
I’m on a Fairphone 5 running official /e/os 3.5.
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Hello PoboEscobar, this won’t help you much, but Curve Pay works perfectly on my FP6 with /e/os 3.5. So there’s some hope that it will work for you too one day.
Thanks Softer, it is reassuring to know that it works on the FP6! It could very well work in a subsequent update, but I felt I should share it here given Curve Pay is mentioned by Gael as being the working option for Contactless payments on /e/os. I know from my own searching of the topic, several month old unresolved threads only leave me more unsure about whether it started working in the meantime!
was Curve installed through Applounge?
is the phone relocked?
It’s said (somewhere in the microg issue tracker) that attaching a Google Account gives basic_integrity in the Playintegrity check.
I’ve installed it through both the App Lounge and Aurora store, making sure to delete the local cache and storage doing so, to no avail. Also, my device is relocked.
I’ve signed in with my google account as well and have installed it then, but it still has the same issue unfortunately.
I’ll give those articles a read see if they help, thanks.
Edit: no joy with either I’m afraid 
I installed Curve Pay from Applounge.
When I use ‘Play Integrity API Checker’ app I get ‘MEETS_BASIC_INTEGRITY’.
Sorry, I don’t know what ‘is the phone relocked?’ means. I can only say that my phone is not rooted.
if you bought the phone from Murena it is relocked - there’s no orange warning screen very early in boot notifying you of its unlocked state.
Did you attach a Google Account by any chance?
So it’s relocked. And yes, I registered a Gmail account in microG. It was mainly so I could use apps purchased from the Play Store (Komoot, etc.).
