public function filterByPhone($phone = null, $comparison = null)
    {
        if (null === $comparison) {
            if (is_array($phone)) {
                $comparison = Criteria::IN;
            } elseif (preg_match('/[\%\*]/', $phone)) {
                $phone = str_replace('*', '%', $phone);
                $comparison = Criteria::LIKE;
            }
        }

        return $this->addUsingAlias(UserPeer::PHONE, $phone, $comparison);
    }