I had initial set up issues with Fountain as well but their support was great at helping resolve things on the back end. The transition was not without bumps but they're a very helpful team.
Is it possible to connect a custom wallet in nostr:nprofile1qqsx2wyjt6lmvc05rrvv05r5hm3w3t7h0pcpmkyswrpd4ymd2u09tscpz3mhxue69uhhyetvv9ujuerpd46hxtnfduq3kamnwvaz7tmwdaehgu339e682mnwv4k8xct5wvhxxmmdqywhwumn8ghj7mn0wd68yttsw43zuam9d3kx7unyv4ezumn9wscn3xgh when using a Nostr-based account? The wallet view has a "Connect via Android Signer" button, but nothing happens though I granted all permissions in Amber. nostr:nprofile1qqswfa547pdmqkerzf2uen3agudc67wxffjmenqpge3dylc006fppyspzemhxue69uhhyetvv9ujumn0wd68ytnzv9hxgqghwaehxw309aex2mrp0yhxvmm4de6xz6tw9enx6qgkwaehxw309aex2mrp0yh8qunfd4skctnwv46qj40rct #asknostr
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I don't hear back from them for the feedback I share within the app, that's why I tried to reach out here. Glad they resolved your issues.