Updated October 13, 2026 · NomadCue Editorial Team
KDDI au vs Mobily
KDDI au
Higher score in this comparison
Mobily
Where KDDI au and Mobily differ
| Compare | KDDI auReviewSee alternativesSee alternatives | MobilyReviewSee alternativesSee alternatives |
|---|---|---|
| Price from | ¥800 | Not confirmed |
| Countries covered | 17 | Not confirmed |
| Unlimited data | Yes | Not confirmed |
| Hotspot sharing | Yes | Not confirmed |
| Reference plan prices | US 800 JPY/24h reserved; Europe 1000 JPY/24h reserved (1000 JPY if any 1000-tier country in the itinerary); Thailand 800 JPY/24h; Turkey 800 JPY/24h; Mexico 800 JPY/24h; global 1000 JPY/24h with advance booking or 1200 JPY/24h without; eligible au plan subscribers get up to 15 days free per month, capped at 18000 JPY/month | Not confirmed |
| Fair use policy | Speed may be throttled if heavy data use occurs within a 24-hour period | Not confirmed |
| Top-ups | Not confirmed | Yes |
Same on both: Seller type (Carrier).
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Key differences
- Support channels: only KDDI au offers Phone.
- Support channels: only Mobily offers Community.
Our verdict on each
KDDI au
KDDI au is a carrier-run daily eSIM from KDDI Corporation that suits au plan subscribers and short trips needing unlimited data and hotspot sharing. Prices start at ¥800 and coverage spans 17 countries, with a fair use policy that can slow speeds after heavy use in a day.
Mobily
Mobily offers eSIMs as a carrier option that includes support for top-ups. For travelers who value direct carrier service and want to extend an eSIM plan, it gives a straightforward choice to check against coverage and device compatibility before travel.
Score breakdown
| Area | KDDI au | Mobily |
|---|---|---|
| Cost | 9.2 | Not confirmed |
| Offer | 8.8Carrier plan from KDDI Corporation with unlimited data, hotspot sharing and prices from ¥800, though coverage is 17 countries. | Not confirmed |
How they place
| Ranking | KDDI au | Mobily |
|---|---|---|
| Travel SIMs and eSIMs | 263 of 926 | 647 of 926 |
| Travel eSIMs | 270 of 918 | 649 of 918 |
Every fact side by side
| Fact | KDDI au | Mobily |
|---|---|---|
| Features | Unlimited data, Hotspot, Carrier plan | Not confirmed |
| Audience | Short trip, Long trip | Not confirmed |
| Legal entity | KDDI Corporation | Not confirmed |
| Headquarters | Not confirmed | Saudi Arabia |
| Support channels | Phone, Help centre | Help centre, Community |
Where each stands against the rest
| Fact | KDDI au | Mobily | Median |
|---|---|---|---|
| Price from | ¥800below the median | Not confirmed | ¥840 |
| Countries covered | 17lowest quarter | Not confirmed | 120 |
Median across 492 listed travel providers.
Pros and cons
KDDI au
Pros
- Unlimited data and hotspot sharing both appear in unlimited data, hotspot and carrier plan, so one phone can carry a laptop for a day of work.
- Prices start at ¥800, with reference rates for the United States, Thailand, Turkey and Mexico at that level.
- It is sold as a carrier plan from KDDI Corporation, and eligible au plan subscribers can pick up a capped free monthly allowance.
Cons
- Coverage of 17 countries is narrow beside Zwitchy at 200.
- Support runs on phone and help centre only, with no live chat or email listed.
- Unlimited data comes with a fair use policy, and speed can be throttled after heavy use within a day.
Mobily
Pros
- Carrier eSIM offering with support for continued use
- Operates as a carrier seller in the eSIM space
Who each suits
KDDI au
Who it suits
- Travellers who already subscribe to au at home and want a carrier daily eSIM rather than a marketplace purchase.
- People needing hotspot sharing alongside unlimited data while working from a laptop, where unlimited data, hotspot and carrier plan carries both.
- Travellers whose trip sits in one of the 17 covered countries and who want the ¥800 entry rate.
Who should look elsewhere
- Anyone needing far wider reach, since Zwitchy covers 200 countries against 17 here.
- Price-first buyers who want a lower starting outlay, since eSIMGo.is lists a from price of $0.99.
- Travellers after a simple single-market eSIM, where SimToIsrael lists a from price of $25.
Mobily
Who it suits
- Travelers preferring carrier provided eSIMs
- Travelers planning to top up eSIMs
Current offers
KDDI au
Current offer
First period offer
AEON online English conversation, first month half price via au overseas page: 6,980 JPY/month -> 3,490 JPY first month (tax incl.) for the daily plan; 4,880 JPY/month -> 2,440 JPY first month (tax incl.) for the 8-lesson plan
Campaign deadline 9/30 (Wed); native-teacher plans; partner offer shown on the au海外放題 page
Source, checked September 26, 2026
Country by country
| Country | KDDI au | Mobily |
|---|---|---|
| Japan | Yes | No |
| Saudi Arabia | No | Yes |
Questions about each
KDDI au
How much does a KDDI au eSIM cost?+
Reference prices are set by region, and the entry price is ¥800. The United States, Thailand, Turkey and Mexico sit at that level, Europe is costlier, and global plans are cheaper when booked in advance. Eligible au plan subscribers can also take a capped free monthly allowance.
Is the data allowance really unlimited?+
Unlimited data and hotspot sharing are both part of unlimited data, hotspot and carrier plan. A fair use policy still applies, with speed throttled if heavy data use happens within a day, so the allowance is generous rather than unthrottled for constant streaming.
Mobily
What type of eSIM service does Mobily provide?+
Mobily offers eSIMs through a carrier model and supports top-ups. Travelers can consider it when they want carrier service and flexible extension. Check device compatibility and coverage details before choosing any plan.
Who might consider Mobily for travel connectivity?+
Mobily suits travelers who prefer buying eSIM connectivity from a carrier. It also fits people who expect to top up rather than replace a plan. Review trip length and usage needs before deciding on an option.
Other options to compare
Related by the facts
KDDI au
Mobily