Shopify Storefront createCustomer does not set phone number

I am trying to call the Shopify storefront GraphQL to create a customer. The customer is being created successfully. However, it does not set the phone number provided for the mutation.

Mutation:

const String customerCreateMutation = r''' 
mutation MyMutation($firstName: String, $lastName: String, $email: String!, $password: String!) {
  customerCreate(input: {firstName: $firstName, lastName: $lastName, email: $email, password: $password}) {
    customer{
      acceptsMarketing
      createdAt
      tags
      displayName
      email
      firstName
      id
      lastName
      phone
   }
  customerUserErrors {
      code
      field
      message
    }
  }
}
''';

Graphql:

final MutationOptions _options = MutationOptions(
      document: gql(customerCreateMutation),
      variables: {
        'firstName': "john",
        'lastName':"doe",
        'email':"john@gmail.com",
        'password': "password",
        'acceptsMarketing': false,
        'phone': "9876543211", /// tried as "+919876543211" too
      },
    );
final QueryResult result = await _graphQLClient!.mutate(_options);

When I print the customer in the result, I get as result.data['customerCreate']['customer'], i ma getting the phone as null.

{__typename: Customer, acceptsMarketing: false, createdAt: 2023-10-19T12:56:35Z, tags: [], displayName: asdasd asdasd, email: as9@asdasdad.asd, firstName: asdasd, id: ********, lastName: asdasd, phone: null, lastIncompleteCheckout: null}

Here, it is sending back the phone as null.

I have checked the created customer in the Shopify store also. But it is also blank.

How do I set the phone number of the customer? Is there any other way?

Shopify storefront GraphQL API uses E.164 standard. for phone number in customerCreate mutation

means you need to add [+] [country code] [number] then it will accept the phone number.

try adding +91

+919876543211 

I think you missed to pass the phone variable in your mutation definition

// OLD missing phone variable
mutation MyMutation($firstName: String, $lastName: String, $email: String!, $password: String!) {
  customerCreate(input: {firstName: $firstName, lastName: $lastName, email: $email, password: $password}) {

// ADD phone variable indefinition
mutation MyMutation($firstName: String, $lastName: String, $email: String!, $phone: String, $password: String!) {
                                                                         HERE ^
  customerCreate(input: {firstName: $firstName, lastName: $lastName, email: $email, phone: $phone, password: $password}) {
                                                                                  HERE ^

if any doubts please comment.