We will keep your phone number for 7 days after its expiration. You can get it back within those 7 days before it’s recycled. After the number recycled, the number may be purchased by another user, and you cannot get it back. (If you have owned the number for less than a month, we can only keep it for one or two days after expiration.)
Therefore, to own a phone number that can be used as your second phone number, it’s best to purchase it so that you can really own it.