var phone = '{{event["new_value"]}}';
phone = Array.from(phone.replace(/\D/g, ''));
if (phone.length == 11) {
    phone[0] = '7';
    phone.splice(4, 0, ' ');
    phone.splice(1, 0, ' ');
    phone.unshift('+');
    phone = phone.join('');
    carrotquest.identify({'$phone': phone});
};