Pirate Praveen@redstarfish @cosmin You could send them a diasp.in invite. Though they have to sign up with a web browser and then login with an app for now. Hopefully we can make this easier soon. We are also working on @prav which will combine app + service, but we are still in beta. If using phone number as a username is fine, then Quicksy would be easier for people, it is available on Play Store and they just need to enter phone number and contacts will be discovered automatically.
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