@FredCai_2251782 If it is more than 180 days since you had an active plan on the old sim, your account would have lapsed and the number would be gone. You can check by logging into your account to see if the number still shows.
If you have just lost the sim, you can order up a replacement via your dashboard. You account will be blocked until you activate the replacement.
When you refer a friend to SMARTY, you’ll both get your choice of a Gift card. We would love to know what type of Gift card you'd want to receive, so that we can make our referral programme even better!