Not a scam, or fake, despite reviews to the contrary! Although it took a while for confirmation email to appear, after purchasing a 3 day pass for Amsterdam, I used easily on tram and metro and support from Conet via email when questions asked was fairly prompt. No app required, download QR code worked fine. However, within our group, several had issues, particularly where they had a payment card connected to phone. Also, on arrival, we discovered it's very easy to purchase a travel card at the station and metro and tram travel is not expensive.
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