Y!mobile — Free Service Overview
Y!mobile is a free Mobile Plans service. Browse features, available discounts, and alternatives below.
Updated: May 2026
About Y!mobile
Y!mobile
Y!mobile is a mobile plans service operated by SoftBank Corp., headquartered in Tokyo, Japan. Founded in 2014, the operator is SoftBank Group on TYO: 9984; SoftBank Corp. on TYO: 9434. The current product is sold under the tier ladder Simple S (3 GB) / Simple M (15 GB) / Simple L (25 GB), with the anchor reference price at Simple M at JPY 3,278 per month in 2026; family lines discounted JPY 1,188/month each. This 2026 review summarises the operator, current pricing, differentiating capabilities and the 2025-2026 buying signal worth weighing before subscribing.
Quick facts
- Operator: SoftBank Corp.
- Headquarters: Tokyo, Japan
- Public-market status: SoftBank Group on TYO: 9984; SoftBank Corp. on TYO: 9434
- Founded: 2014
- Current tiers: Simple S (3 GB) / Simple M (15 GB) / Simple L (25 GB)
- Anchor price (2026): Simple M at JPY 3,278 per month in 2026; family lines discounted JPY 1,188/month each
- 2025-2026 differentiator: 2025-2026 fully on SoftBank 5G with the Y!mobile shop network kept distinct from SoftBank-branded stores; expanded eSIM activation flow
What is Y!mobile?
Y!mobile is operated by SoftBank Corp. out of Tokyo, Japan. SoftBank sub-brand competing with ahamo (Docomo), UQ mobile (KDDI) and Rakuten Mobile. The product is sold through https://www.ymobile.jp and supporting mobile apps, billed in local currency per market.
Why choose Y!mobile?
The case for Y!mobile centres on three points: a defined operator (SoftBank Corp., founded 2014); a current product slate that matches the mobile plans buying signal; and a 2025-2026 differentiator (2025-2026 fully on SoftBank 5G with the Y!mobile shop network kept distinct from SoftBank-branded stores; expanded eSIM activation flow) that distinguishes 2026's proposition from prior years.
Operator credibility
SoftBank Corp. has been active since 2014 and is currently SoftBank Group on TYO: 9984; SoftBank Corp. on TYO: 9434. That history matters because the mobile plans category is crowded with shorter-lived operators; buyers reasonably weight a multi-year track record alongside the current feature list.
Plan structure and pricing anchor
The tier ladder is Simple S (3 GB) / Simple M (15 GB) / Simple L (25 GB), with the anchor reference price at Simple M at JPY 3,278 per month in 2026; family lines discounted JPY 1,188/month each. Confirm live regional prices on the operator's site and consult Subger's true-price tracker for Y!mobile for the actual all-in renewal cost after taxes, FX and promotional anchors.
2025-2026 product signal
The most material development to weigh for 2026 is: 2025-2026 fully on SoftBank 5G with the Y!mobile shop network kept distinct from SoftBank-branded stores; expanded eSIM activation flow. This is the change that distinguishes the current subscription proposition from the prior year and the comparable point on competitor roadmaps.
Y!mobile features that matter in 2026
Highlights of the current feature set:
- SoftBank 4G LTE and 5G network
- Up to 9 family lines with discount stacking
- PayPay coupon perks
- Yahoo! Premium membership included
- International calling bundles
- eSIM available on most current handsets
The features above are the ones Y!mobile markets in 2026. Treat the 2025-2026 differentiator — 2025-2026 fully on SoftBank 5G with the Y!mobile shop network kept distinct from SoftBank-branded stores; expanded eSIM activation flow — as the live signal that separates the current product from past-year reviews of the same brand.
Y!mobile pricing in 2026
The anchor reference price for 2026 is Simple M at JPY 3,278 per month in 2026; family lines discounted JPY 1,188/month each. The full tier comparison:
| Tier | Best for | Reference price (2026) |
|---|---|---|
| Simple S (3 GB) | Entry / trial | Simple M at JPY 3,278 per month in 2026; family lines discounted JPY 1,188/month each |
| Simple M (15 GB) | Mainstream subscribers | Confirm live on the operator's plans page |
| Simple L (25 GB) | Power users / households | Confirm live on the operator's plans page |
Subger pairs the public price with the actual all-in cost (taxes, FX conversion, promotional first-period anchors that step up at renewal):
| Subger tool | What it shows |
|---|---|
| True-price tracker | List price changes plus historical promotional anchors |
| Deals page | Active discounts and limited-time offers |
| Promo codes | Stackable codes for new and existing subscribers |
| Cancel guide | Step-by-step termination by billing surface |
Y!mobile apps and platform support
| Surface | Status |
|---|---|
| 4G LTE | Yes |
| 5G | Yes in covered regions |
| eSIM | Yes on selected handsets |
| Self-care app | iOS and Android |
| International roaming | Yes (terms vary) |
| In-store sales | Operator retail network |
Network and coverage
In the mobile plans category, the variables that move buyer decisions are network technology, coverage map and roaming arrangements. Y!mobile's answer to those variables is shaped by SoftBank Corp.'s 2025-2026 priorities, with the differentiator above the most current public signal. SoftBank sub-brand competing with ahamo (Docomo), UQ mobile (KDDI) and Rakuten Mobile.
Reading the competitive set
The decision usually comes down to: (a) operator regional / vertical fit, (b) whether the tier ladder matches usage, and (c) whether the 2025-2026 differentiator is worth the headline price versus the substitutes.
Where Y!mobile fits best
Strongest fit is buyers who specifically want SoftBank Corp.'s positioning and the current differentiator (2025-2026 fully on SoftBank 5G with the Y!mobile shop network kept distinct from SoftBank-branded stores; expanded eSIM activation flow).
Who Y!mobile fits
Y!mobile is a good match for the following buyers:
- The category-focused subscriber who wants a mobile plans service from a named operator (SoftBank Corp.) rather than a generic global aggregator.
- The tier-conscious buyer evaluating the ladder (Simple S (3 GB) / Simple M (15 GB) / Simple L (25 GB)) and willing to pay up for the feature set above.
- The 2026 buyer who specifically wants the operator's current differentiator: 2025-2026 fully on SoftBank 5G with the Y!mobile shop network kept distinct from SoftBank-branded stores; expanded eSIM activation flow.
- The substitute-aware buyer weighing Y!mobile against the named competitive set in the positioning line.
- The cross-device user who needs apps across the platforms shown in the table above plus a credible upgrade path as new tiers ship.
Frequently asked questions
How much does Y!mobile cost in 2026?
The anchor reference price is Simple M at JPY 3,278 per month in 2026; family lines discounted JPY 1,188/month each. The full tier list (Simple S (3 GB) / Simple M (15 GB) / Simple L (25 GB)) is summarised in the pricing table above. Confirm live regional prices on the operator's site and pair with Subger's true-price tracker for the actual renewal cost.
Who operates Y!mobile?
Y!mobile is operated by SoftBank Corp., headquartered in Tokyo, Japan. The operator was founded in 2014 and is SoftBank Group on TYO: 9984; SoftBank Corp. on TYO: 9434.
What is Y!mobile's 2025-2026 differentiator?
2025-2026 fully on SoftBank 5G with the Y!mobile shop network kept distinct from SoftBank-branded stores; expanded eSIM activation flow. This is the most current public signal on the operator's product roadmap and the change that separates 2026 reviews from 2024 reviews of the same brand.
What platforms does Y!mobile support?
Coverage spans the surfaces shown in the platform table above. The current mobile, web and (where applicable) device apps are the recommended way to consume the service; older first-generation devices may be deprecated in successive releases.
How do I cancel Y!mobile?
Cancel through the account or subscription settings on the surface where you bought the plan: the operator's website for direct subscriptions, the App Store or Google Play for in-app purchases, or the partner billing portal for bundled subscriptions. Subger's cancellation guide walks through each route step-by-step.
Does Y!mobile offer a family, household or multi-user plan?
Family or multi-account structures depend on the tier. Higher tiers commonly add multi-profile, multi-device or multi-line support; entry tiers may restrict simultaneous seats. Confirm the per-tier seat or device limit on the live pricing page.
Is Y!mobile worth it compared to alternatives?
It depends on three factors: the feature mix you'll use, the regional price after taxes (Subger's true-price tracker reconciles headline vs renewal cost), and credibility of the 2025-2026 roadmap. Budget-constrained users may prefer the entry tier or wait for promotional pricing.
How can I track price changes for Y!mobile?
Subger's renewal tracker for Y!mobile records list-price changes plus promotional anchors over time. Pair it with the deals page for current discount offers and the promo codes page for stackable savings at signup.
Get started with Y!mobile
Confirm the current regional price on the operator's site (https://www.ymobile.jp), choose the tier that matches your usage (Simple S (3 GB) and Simple M (15 GB) are the most common starting points), and check Subger's deals page for Y!mobile for promotional anchors before completing checkout. Track the subscription's true renewal cost with the true-price tracker once you're signed up.
Related Subger guides
Pricing
| Regional pricing | Simple S (4GB) | Simple M (20GB) | Simple L (30GB) |
|---|---|---|---|
| 🇯🇵JapanJPY | ¥2,365.00≈ $15.05 | ¥4,015.00≈ $25.55 | ¥5,115.00≈ $32.55 |
Prices converted at current exchange rate
Sources
Subger is not affiliated with, endorsed by, or connected to Y!mobile or its parent companies. All trademarks, service marks, and logos belong to their respective owners. Information on this page is provided for informational and comparison purposes only. Pricing and plan details are sourced from publicly available information and may not reflect current offerings — please verify with the official provider. If you are a representative of this service and believe any information is inaccurate, please contact us at info@subger.com.
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