> Why not alphanumeric Because that mean re-inventing the phone system and making it incompatible with all existing and future devices made for the whole rest

> Why not alphanumeric Because that mean re-inventing the phone system and making it incompatible with all existing and future devices made for the whole rest of the world. These are going to be for 5G IoT devices anyway, the phone number is just going to be for billing use, all the actual traffic is going to be over IP