private async Task OrderPhoneRequestApply_Entry(String phone)
 {
     this.phone = PhoneParser.ParsePhone(phone);
 }
 private Boolean IsValidPhone(String phoneNumber)
 {
     return(PhoneParser.ParsePhone(phoneNumber) != null);
 }
 private async Task OrderCallerPhoneConfirmApply_Entry()
 {
     this.phone = PhoneParser.ParsePhone(this.callerPhone);
 }