Validates that the given Mobile Number is, in fact, a valid phone number.  When 
Valid is 
true, the Mobile Number value returned in the field 
PhoneNumber
                                                            should be used in subsequent calls, as it is properly formatted.
                                                            
                                                                
                                                                    
                                                                        | 
                                                                                O/R
                                                                             | Parameter | Type | 
                                                                                Description
                                                                             | 
                                                                
                                                                
                                                                    
                                                                        | Req | CallerGUID | char(36) | Assigned Caller GUID for this environment. | 
                                                                    
                                                                        | Req | CallerPW | char(36) | Assigned Caller Password for this environment. | 
                                                                    
                                                                        | Req | MobileNumber | varchar(25) | The Mobile Number to be validated. | 
                                                                
                                                            
                                                            
                                                                
                                                                    
                                                                        | Responses | Description | 
                                                                
                                                                
                                                                    
                                                                        | Success - Valid Phone Number | Phone number is a valid phone number. JSON:
 {"Status":"Success", "CallingCountryCode":1, "CountryCode":"US", "NationalFormat":"(212) 555-1212", "PhoneNumber":"+12125551212", "Valid":true} | 
                                                                    
                                                                        | Success - Invalid Phone Number | Phone number is NOT a valid phone number. JSON:
 {"Status":"Success", "CallingCountryCode":0, "CountryCode":null, "NationalFormat":"212551212", "PhoneNumber":"+1212551212", "Valid":false} | 
                                                                    
                                                                        | Authentication Failure | Either Username, Password, IP Address or API Access is not valid for the given environment. JSON:
 {"Status":"Authentication Failure"} | 
                                                                    
                                                                        | Error | An unknown error has occurred. JSON:
 {"Status":"Error"} |