Deciding between GigSky and Ubigi? Here is how they compare, point by point — and why SimbaSIM is the better pick than either: truly unlimited data that never stops, plus what neither of them gives you: unused days refunded.
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Full refund if it never connects
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Why SimbaSIM beats both GigSky and Ubigi
Truly unlimited — your data never stops
Every plan is unlimited data for its whole length, in all 136 destinations. No data packs to size, no top-ups to remember, no overage charges.
Exact 3, 7 and 14-day plans
The same three lengths in all 136 destinations.
Ubigi: No unlimited plan for exactly 3 days in Japan, 7 days in Japan, 14 days in Japan.
Refund if it never connects, even after installing
Full refund if it will not install or never connects.
GigSky: The terms rule out refunds for unused plans; requests are case by case.
Unused days refunded
Unused days refunded within 30 days of purchase.
GigSky: No refund for unused data.
Ubigi: No refund once you have started using it.
24/7 chat without their app
24/7 chat on the website, no app or account.
Ubigi: Support starts with a web form; WhatsApp is an AI assistant.
GigSky vs Ubigi vs SimbaSIM, side by side
From each brand’s own website, help pages and terms, checked 3 October 2026.
Feature
SimbaSIM
GigSky
Ubigi
Every plan is unlimited data
Yes
NoAlso sells fixed-data packs you have to size.
NoAlso sells fixed-data packs you have to size.
No app or account needed
Yes
Yes
Yes
Days start when you land
Yes
Yes
Yes
Add days to the same eSIM
Yes
Yes
Yes
Exact 3, 7 and 14-day plans
Yes
Yes
NoNo unlimited plan for exactly 3 days in Japan, 7 days in Japan, 14 days in Japan.
Refund if it never connects, even after installing
Yes
NoThe terms rule out refunds for unused plans; requests are case by case.
Yes
Unused days refunded
Yes
NoNo refund for unused data.
NoNo refund once you have started using it.
24/7 chat without their app
Yes
Yes
NoSupport starts with a web form; WhatsApp is an AI assistant.
Boxes ticked
8 of 8
5 of 8
4 of 8
GigSky or Ubigi: which is better?
GigSky
Best for cruise passengers and multi-country travellers who want a long-running brand with flexible plan lengths.
Ahead of Ubigi on
Exact 3, 7 and 14-day plans
24/7 chat without their app
Before you buy
The terms rule out refunds for unused plans; newer requests are case by case.
The plan starts on any covered network and cannot be paused — easy to start early on a cruise.
Some reviewers report slow or patchy coverage in places.
Refunds
The terms say unused data and plans are not refunded. A newer in-app request flow reviews cases individually; refunds may come as credit.
Ubigi
Best for frequent travellers who want one carrier-backed eSIM to top up trip after trip.
Ahead of GigSky on
Refund if it never connects, even after installing
Before you buy
No unlimited plan shorter than 8 days in Japan or Turkey.
A narrow refund window, and the terms contradict the help centre.
Human support starts with a web form; reviewers mention slow replies.
Refunds
Refund only if no data has been used, requested within 14 business days of purchase. The terms are stricter: a plan cannot be refunded once bought.
Or skip the trade-off: SimbaSIM
Truly unlimited data on every plan: 3, 7 or 14 days in 136 destinations
No app, no account — your eSIM is delivered in 1 minute
Days start when you land, and more days go onto the same eSIM
Full refund if it never connects; unused days refunded within 30 days
GigSky is ahead of Ubigi on exact 3, 7 and 14-day plans; and 24/7 chat without their app. Ubigi is ahead of GigSky on refund if it never connects, even after installing. GigSky suits cruise passengers and multi-country travellers who want a long-running brand with flexible plan lengths. Ubigi suits frequent travellers who want one carrier-backed eSIM to top up trip after trip. If you want every box ticked — truly unlimited data, no app, a refund if it never connects — SimbaSIM is the better pick than either.
Do GigSky and Ubigi need an app?+
GigSky can be used without its app. Ubigi can be used without its app. SimbaSIM needs no app and no account: you buy on the website and your eSIM is delivered by email in 1 minute.
What are GigSky’s and Ubigi’s refund policies?+
GigSky: The terms say unused data and plans are not refunded. A newer in-app request flow reviews cases individually; refunds may come as credit. Ubigi: Refund only if no data has been used, requested within 14 business days of purchase. The terms are stricter: a plan cannot be refunded once bought. SimbaSIM refunds in full if the eSIM will not install or never connects — even after you have installed it — and refunds unused days within 30 days of purchase.
Is there a better alternative to GigSky and Ubigi?+
SimbaSIM. Every plan is truly unlimited data, and it gives you what neither GigSky nor Ubigi does: every plan is unlimited data and unused days refunded. Plans start at $12.90 for 3 days in 136 destinations.
GigSky and Ubigi are trademarks of their owners. SimbaSIM is not affiliated with or endorsed by either. Details about GigSky and Ubigi were taken from their own websites and terms on 3 October 2026 and may since have changed.
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