You must join Keybase, which is free and open source. And you must prove you’re a real human, by receiving an SMS.
You must verify a phone number in a country that hasn’t attacked us with fake accounts. The current list of acceptable countries is: Argentina, Australia, Austria, Belgium, Belize, Bermuda, Bolivia, Brazil, Bulgaria, Chile, Croatia, Costa Rica, Dominican Republic, Ecuador, El Salvador, Republic of Cyprus, Czech Republic, Denmark, Estonia, Finland, France, French Guiana, Germany, Greece, Guatemala, Guyana, Haiti, Honduras, Hungary, Iceland, Ireland, Italy, Japan, Kenya, Latvia, Lithuania, Luxembourg, Malta, Mexico, Netherlands, Nicaragua, Nigeria, New Zealand, Norway, Panama, Paraguay, Peru, Poland, Portugal, Romania, Slovakia, Slovenia, South Africa, Spain, Sweden, Switzerland, United Kingdom, United States, Venezuela.
We will edit this list if necessary.
Canada is excluded due to our inability to verify Canadian phone numbers were not purchased at scale.