forgotten where clause

	public function getSimCardList ($userId) {

		$simCardList = array();

		$sql = 'SELECT sms_card_number,  max(id) as id, sms_card_slot, sms_icc_id, sms_device_name, sms_carrier_name FROM `*PREFIX*esms_smsdatas` 

		WHERE `user_id` = ?

		group by sms_card_number,  sms_card_slot, sms_icc_id, sms_device_name, sms_carrier_name order by id DESC';

		$stmt = $this->db->prepare($sql);

		$stmt->bindParam(1, $userId, \PDO::PARAM_STR);

		$result = $stmt->execute();

		while ($row = $stmt->fetch()) {