Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE customers ( customer_name VARCHAR, customer_phone VARCHAR, customer_id VARCHAR )
TABLE: CREATE TABLE order_items ( order_id VARCHAR, order_quantity INTEGER )
TABLE: CREATE TABLE customer_orders ( customer_id VARCHAR, order_id VARCHAR )

### Question ###
What are the name and phone of the customer with the most ordered product quantity?

### Accurate SQL ###

SELECT T1.customer_name, T1.customer_phone FROM customers AS T1 JOIN customer_orders AS T2 ON T1.customer_id = T2.customer_id JOIN order_items AS T3 ON T3.order_id = T2.order_id GROUP BY T1.customer_id ORDER BY SUM(T3.order_quantity) DESC LIMIT 1