Phones ? You are complaining about phones ? What about the charge adapters used to charge the phones ? Those differ. What about the sockets where we plug in the differing chargers to power the phones ? Those differ. What about the voltage levels in the differing sockets where we plug in the differing chargers to power the phones ? Those differ. What about the unit of distance that the electricity is delivered over for the differing voltage levels for the differing sockets where we plug in the differing chargers to power the phone ? Those differ. Phones !! pfft.