We are offering you the reusable Sim card which can be used for 15 months continuously (from the 1st activation date). Therefore, our customers do not need to keep chasing for the courier company or seller to deliver the physical cards. Our customer just need to purchase the (empty) SIM card for the 1st time (yes, it is empty sim card), then whenever the customer want to travel, just come to our website to purchase for the data plan (any country) which are available. We are also selling at the other major online platforms.