Call-only SIM is the cheapest and most recommended! Complete Price Comparison Guide

People looking for budget SIMs with call functions, especially those who think “call-only is sufficient” or want to minimize monthly costs, are likely many. To choose the most suitable service from multiple voice call SIM providers based on actual usage scenarios, a comprehensive assessment beyond just low price is necessary. This article compares the top 10 services across three axes: monthly fee, initial cost, and basic call charges, thoroughly evaluating the best SIM for call-only users.

Three Services That Achieve the Lowest Maintenance Cost

When considering call-only use, there are services that can start at zero yen per month. “povo,” which has a basic fee of zero yen, requires topping up every 180 days, but for those who only want to maintain a phone number, it’s the strongest option. Meanwhile, “HIS Mobile” offers a low monthly fee of 280 yen with a pay-as-you-go model, making it cost-efficient over the long term even after factoring in the initial 3,300 yen fee. Additionally, “mineo” offers a plan at 250 yen per month, which, although with slower data speeds, is ideal for maintaining a dedicated call-only smartphone. These three services are practical choices for call-only users seeking the lowest ongoing costs.

Actual Comparison of Call Rates

Call charges vary significantly among services. The standard rate is generally around 11 yen per 30 seconds, but services like povo and LinksMate charge 22 yen per 30 seconds, double the usual. However, povo users can opt for a 5-minute unlimited call plan for 550 yen per month. Many services also offer discounted call rates when using dedicated apps, reducing the rate to as low as 9 yen per 30 seconds (HIS Mobile) or 11 yen (Japan Communications SIM, AEON Mobile, IIJmio). Rakuten Mobile offers unlimited calls via its dedicated app “Rakuten Link,” providing additional value for heavy callers.

Initial Costs Ranging from Zero to Over 3,000 Yen

Initial setup costs are an important factor in choosing a service. povo and Rakuten Mobile have no initial fee, making it easy to start, while many MVNOs charge an administrative fee of 3,300 to 3,740 yen. BB.excite Mobile takes a different approach by waiving the administrative fee, opting for an eSIM-unfriendly model to keep initial investment low. For long-term use, monthly costs are more critical than initial fees, but if you want to test a second phone number, starting with a zero-initial-cost service is wise.

Reasons to Choose eSIM-Compatible Services

If you already have one smartphone and want to use dual SIMs with a different number, prioritizing eSIM-compatible services is recommended. Providers like povo, Rakuten Mobile, Japan Communications, NURO Mobile, IIJmio, and LinksMate support eSIM, allowing quick activation without waiting for physical SIM delivery. Conversely, AEON Mobile and BB.excite Mobile do not support eSIM, requiring physical SIM card insertion. eSIM services offer high convenience and flexibility for using multiple carriers.

Support at Physical Stores

If you feel uneasy about online contracts, consider services that offer in-store support. mineo, AEON Mobile, IIJmio, and Rakuten Mobile allow applications and initial setup at physical stores. AEON Mobile, in particular, can be handled at AEON’s nationwide stores, making it convenient to ask questions while shopping. IIJmio is available at electronics retailers like Bic Camera and Sofmap, providing peace of mind with after-sales support.

Final Recommendations for Call-Only Users

Overall, for call-only use, the following priority order is recommended: Lowest ongoing cost—povo (0 yen) → mineo (250 yen/month) → HIS Mobile (280 yen/month). For moderate call usage, consider services with low call rates such as Japan Communications SIM (11 yen/30 sec, 290 yen/month) or HIS Mobile (9 yen/30 sec, 280 yen/month). For frequent callers, leveraging Rakuten Mobile’s “Rakuten Link” unlimited calls offers the most cost-effective solution. If in-store support is a priority, then mineo, AEON Mobile, and Rakuten Mobile are suitable options.

When choosing the cheapest call-only SIM, it’s essential to evaluate not only monthly fees but also initial costs, call charges, support options, and eSIM compatibility. Selecting the service that best fits your usage pattern will allow you to maintain your phone number efficiently and without waste.