That, and how much existing infrastructure there is. Many places leapfrogged directly to mobile phones (featurephones mostly) because there were little to no p

That, and how much existing infrastructure there is. Many places leapfrogged directly to mobile phones (featurephones mostly) because there were little to no power and/or landline wiring present (and attempts at getting such infrastructure in place got disrupted by people stealing the wiring and selling it as scrap copper).