-(void)verifyUserAuthorizationInIOS9andLower{

CNContactStore * contactStore = [[CNContactStore alloc]init];

if ([CNContactStore authorizationStatusForEntityType:CNEntityTypeContacts] == CNAuthorizationStatusNotDetermined) {
    [contactStore requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * __nullable error) {

        if (granted==YES) {
            [self addContactInIOS9andLower];

            if ([self addContactInIOS9andLower]) {
                NSLog(@"Error");
            }

            else{
                NSLog(@"Error");
            }
        }

        else{
            NSLog(@"Error");
        }

    }];

}

else if ([CNContactStore authorizationStatusForEntityType:CNEntityTypeContacts] == CNAuthorizationStatusAuthorized){
    [self addContactInIOS9andLower];
}
else {
    NSLog(@"Error");
}
}


-(BOOL)addContactInIOS9andLower{

CNContactStore * contactStore = [[CNContactStore alloc]init];

CNMutableContact *mutableContact = [[CNMutableContact alloc]init];

mutableContact.givenName = name;
mutableContact.familyName = lastname;

mutableContact.phoneNumbers = [[NSArray alloc]initWithObjects:[CNLabeledValue labeledValueWithLabel:CNLabelPhoneNumberiPhone value:[CNPhoneNumber phoneNumberWithStringValue:phone]], nil];

CNSaveRequest * saveRequest = [[CNSaveRequest alloc]init];
[saveRequest addContact:mutableContact toContainerWithIdentifier:nil];

NSError *error = nil;

if ([contactStore executeSaveRequest:saveRequest error:&error]){
    return NO;
}

else{
    return YES;
}
}