Code Country Standard Startup Subscribers Subs Date Operator U.S. Partners Vendor Coverage Other AR-4 Argentina AMPS 10/94 Compania de Telefonos del Interior GTE 23%, AT&T 10% AT&T Southern Region different prices for AR-4 Argentina AMPS 10/94 Compania de Telefonos del Interior GTE 23%, AT&T 10% Plexsys Southern Region different prices for AR-4 Argentina AMPS 10/94 Compania de Telefonos del Interior GTE 23%, AT&T 10% Astronet Southern Region different prices for