This error occurred because you provided an incorrect value for the field.

MSISDN means - Mobile Station International Subscriber Directory Number

To resolve this error, follow these guidelines -

1 - Check if the phone number provided has the correct number of digits.

2 - Ensure that the phone number is in the correct format based on the country code.

3 - Remove any additional characters such as dashes, parentheses, spaces, or symbols.

Try entering the phone number again and ensure that it is in the correct format.

Acceptable format = [+][country code][area code][local phone number]

For Example,

Phone number = 489-6789           | Mobile Number = 94xxxxxxx9
Country = United States                 | Country = United States
Country Code = 1                               | Country Code = 1
Area Code = 236                               |
                                                                  |
Valid number = +12364896789     | Valid number = +194xxxxxxx9

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