Yesim eSIM Code WELCOMETOYESIM: 15% Off Your First Travel Data Plan, Plus 5% Ycoins Cashback and Built-In VPN
Operated by Switzerland's Genesis Group AG, Yesim sells travel eSIMs across 200+ destinations (Japan 5GB US$10.56, Thailand 10GB US$13.20, UK 5GB US$11.52, Mainland China 5GB US$13.20), a 170+ country Pay & Fly pay-as-you-go eSIM and a free built-in VPN. Open Yesim via this site's web or app links and enter official promo code WELCOMETOYESIM at checkout for 15% off your first eSIM purchase, plus 5% back in Ycoins when paying by card. Hong Kong readers should check their phone hardware before buying: most dual-physical-SIM iPhones sold in Hong Kong and Macau do not support eSIM (dial *#06# to confirm an EID appears).
Read our full assessment →Quick answer
Use code WELCOMETOYESIM for the Yesim offer. New eligible customers can get 15% off first plan after meeting the requirement: 15% off your first Yesim eSIM plan with code WELCOMETOYESIM at checkout; card payments also earn 5% Ycoins cashback. Last verified 2026-11-09.
- Reward
- 15% off first plan
- Referral code
WELCOMETOYESIM- Last verified
- 2026-11-09
- Difficulty
- Easy
- Time to claim
- About 5 minutes to sign up and install the eSIM
- Time to payout
- 15% discount applied at checkout; 5% Ycoins cashback credited on card purchases
WELCOMETOYESIMAd / referral links — we may earn a bonus when you sign up.
How to claim
- Check your phone hardware first: dial *#06# and confirm a 32-digit EID number is shown (most Hong Kong and Macau iPhone XR, XS Max and iPhone 11 to 16 models have dual physical nano-SIM slots and no eSIM).
- Open the Yesim website link or app button on this page and create an account with email, Google or Apple.
- Pick a single-country data plan (such as Japan, Thailand, the UK or Mainland China), a global Pay & Fly pay-as-you-go plan or an Annual Global Unlim Day Pass.
- Enter promo code WELCOMETOYESIM at checkout and verify that 15% is deducted from the total.
- Pay with Visa, Mastercard, Apple Pay or Google Pay; card payments earn 5% cashback in Ycoins (100 Ycoins = €1 / US$1).
- Install the eSIM via the app before departure (or upon arrival in Japan for Japan fixed plans) and enable data roaming; if you turn on Auto-Top-Up, note that it re-bills your plan automatically when data drops below 30% or 1 day before expiry.
Eligibility & requirements
- Operated by Genesis Group AG (Baar, Canton of Zug, Switzerland, CHE-135.623.633) under Swiss law.
- Requires an unlocked, eSIM-compatible device. Most Hong Kong/Macau iPhones (except iPhone XS, 12 mini, 13 mini, SE 2nd/3rd gen and iPhone 16e) lack eSIM hardware.
- Promo code WELCOMETOYESIM applies a 15% discount to your first eSIM purchase; one promo code per order.
- The 30-day refund window applies only to completely unactivated, unused plans (installing the eSIM counts as activation). Technical faults must be reported to [email protected] with screenshots within 1 hour of occurrence.
- Under Terms s.7.4, any approved refund of €10 (or equivalent) or less is paid exclusively in non-withdrawable Ycoins, never back to your card.
- Adding a payment card or redeeming free Ycoins triggers a €0.50 verification charge that is refunded immediately as €0.50 in Ycoins.
- Japan fixed data plans have a 90-day activation window, cannot be topped up and should be installed upon arrival in Japan.
Verification notes
- Minimum spend/deposit
- 15% off your first Yesim eSIM plan with code WELCOMETOYESIM at checkout; card payments also earn 5% Ycoins cashback
- Last verified
- 9 November 2026
Provider terms can change without warning. Treat this as a verification snapshot and confirm the live terms before applying.
Pros
- Code WELCOMETOYESIM takes 15% off your first order — bringing Japan 5GB (30 days) from US$10.56 to ~US$8.98 (about HK$70) and Thailand 10GB (30 days) from US$13.20 to ~US$11.22 (about HK$87).
- Includes a free built-in VPN in the iOS/Android app, and Mainland China plans work with WhatsApp, Google and Instagram without a separate VPN.
- SwitchLess auto-switches across 800+ partner networks, alongside a reusable Pay & Fly global eSIM billed per MB from US$1.10/GB.
- 5% Ycoins cashback on card payments towards future data plans.
- Rated 4.8 on Google Play (29,600+ ratings) and 4.7 on the UK App Store (1,800+ ratings).
Watch out for
- Dual-nano-SIM iPhones sold in Hong Kong and Macau cannot install eSIMs.
- Strict refund rules: installing the eSIM counts as activation, technical faults must be reported within 1 hour, and refunds of €10 or less go only to Ycoins.
- Auto-Top-Up, if enabled, automatically repeats your last purchase at 30% remaining data or 1 day before expiry.
- Standard plans are data-only; optional US$7.20/month virtual numbers are VoIP-based, not guaranteed to work with all bank/app OTP checks, and carry a €1,000 penalty for AUP/spam breaches.
- Billed in USD/EUR and processed in Switzerland, so some Hong Kong credit cards charge a foreign transaction fee.
FAQ
- Will Yesim work on an iPhone bought in Hong Kong?
- Check your model first. Most iPhones sold in Hong Kong and Macau from iPhone XR through iPhone 16 (except iPhone XS, 12 mini, 13 mini, SE 2/3 and 16e) use two physical nano-SIM slots and have no eSIM chip. Dial *#06# on your phone — if an EID number appears, your phone supports eSIM.
- How much does code WELCOMETOYESIM save?
- It takes 15% off your first Yesim eSIM data plan at checkout. Paying by card also earns 5% cashback in Ycoins for future purchases.
- Does Yesim work in Mainland China without a separate VPN?
- Yes. Yesim's Mainland China plans route traffic so WhatsApp, Google, YouTube and Instagram work directly, and the Yesim app also includes a free built-in VPN.
- Can I get a refund back to my credit card if I don't use the eSIM?
- Unactivated, uninstalled plans can be refunded within 30 days, but Terms s.7.4 states that any refund of €10 (or equivalent) or less is credited only in Ycoins inside the app. Only refunds above €10 can be returned to your original payment card.
- How does Yesim Pay & Fly work?
- Pay & Fly gives you one global eSIM covering 170+ countries that deducts per MB used from your Ycoins balance (from US$1.10/GB). Top-up presets start at US$18, and your balance does not expire as long as you open the app at least once every 180 days.
Related offers
Provider
Saily
Use JIMMYU6940 at your first Saily checkout: standard/Ultra discounts are US$5/US$10, €4/€8 or £4/£8 by account currency. The plan must cost at least US$5.60, €5 or £4.50, so 1GB plans don't qualify, and the referral cannot combine with other promotions.
Requirement: First purchase; USD minimum US$5.60, EUR €5, GBP £4.50; no combination with other promotions
Easy5 minutesPayout At checkout
Verified 13 October 2026
Provider
Airalo
New Airalo customers get US$3 off their first purchase with code JIMMY2336, added at sign-up or at checkout (Airalo shows it as £2.50 when you pay in pounds). Only one discount method works per order, so check the order summary shows the deduction before you pay.
Requirement: First purchase only; Airalo's Refer and earn page lists no minimum spend
Easy5 minutesPayout Discount applied to your first eSIM purchase
Verified 13 October 2026
Provider
HKBN
Register a designated HKBN service through this page’s link and enter KWOKCWJ03554 as the promo code. Once the service is activated and the first bill is paid, HKBN applies bill credit within 8 weeks: HK$400 for 24-month home broadband, HK$150 for 24-month mobile, or HK$100 or HK$50 for 24- or 12-month streaming plans. The credit reduces monthly charges and is not cash.
Requirement: A designated 24-month broadband or mobile plan, or a 12- or 24-month streaming plan, with the first bill paid
EasyAbout 10 minutes to register a plan onlinePayout Within 8 weeks after activation and payment of the first bill
Verified 24 October 2026
Added 9 November 2026 · Last updated 9 November 2026. Offers and terms change frequently - always confirm on the provider's site before applying.