eSIM promo code not working: 7 common reasons

If a promo code didn't apply, the cause is almost always one of these.

1. You're checking out as a guest — many providers only apply codes after sign-up.
2. The code is for new customers only, and you've ordered before.
3. A stray space at the start or end — it sometimes sneaks in when copying.
4. Letter case: some codes (Yesim's, for example) are case-sensitive.
5. The code can't be combined with another discount or sale.
6. It has expired — check the date on the coupon card.
7. The code only works for certain plans or countries.

💡 Tip: Click “No” on the coupon card — it helps us find codes that need re-checking faster.