Phone numbers

A phone number here is a string of digits, with * standing for key 10 and # for key 11, the same form Phones.All() gives you. The number has to be one the game’s phone book knows, so an empty string, any other character, or a number that matches nothing makes the call fail.

Limits

• A number that is hidden in the phone book can’t be dialled. The game does not let a phone reach a hidden entry either. (The string is turned into a PhoneNumber by searching PhoneNumberDatabase.database with the game’s own PhoneNumber.ValidateNumber. An entry marked notIndexed can’t be found that way, as in the game.)