International Sim Discount Codes & Vouchers 2021

How to redeem a International Sim offer?

Now that you've hopefully found a International Sim promotional code, get ready for some great savings. Redeeming your code is easy, here is how:

1. Select the product, add to the basket and go to the checkout area on the International Sim website.
2. Copy down the International Sim promotional code above, to your clipboard.
3. In the checkout page, before you pay, paste your voucher code into the "Voucher Code" field under your basket.
4. Finally, click "Apply code" or similar. Your discount is now active.