IssueTracker

Description

The libphonenumber library incorrectly identifies certain valid French mobile numbers starting with +337 as invalid. For example, the number +33712392786, which is a valid French mobile number, is rejected by the library when using isValidNumber().

Steps to Reproduce

    Use the libphonenumber library (version 8.13.53) in PHP or test via the demo app.

    Parse and validate the number +33712392786 with the country code FR.

    Example PHP code:

use libphonenumber\PhoneNumberUtil;

$phoneUtil = PhoneNumberUtil::getInstance();
$parsedPhone = $phoneUtil->parse('+33712392786', 'FR');

if (!$phoneUtil->isValidNumber($parsedPhone)) {
    echo 'Invalid phone number';
} else {
    echo 'Valid phone number';
}

Observe that the number is incorrectly flagged as invalid.


Expected Behavior

The number +33712392786 should be identified as a valid French mobile number since it adheres to the numbering plan for French mobile numbers (+336 and +337).
Actual Behavior

The number +33712392786 is incorrectly rejected as invalid.
Evidence

    Country: France (FR)
    Example number(s) and/or ranges: +33712392786
    Authoritative Evidence:
        ARCEP French National Numbering Plan (See pages detailing valid ranges for mobile numbers).
        French mobile numbers include the 07 prefix when dialing domestically, corresponding to +337 in international format.
    Demo Link Showing Error:
    libphonenumber Demo App results for +33712392786.

Additional Information

    Library Version: 8.13.53
    Platform: PHP (giggsey/libphonenumber-for-php)
    The number was confirmed to be valid via local operator validation and conforms to the French numbering plan.
    If additional information is required, I can provide further examples or operator references.