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Until a few years ago, smartphones were mainly sold at shops operated by telecommunications carriers. Each terminal is SIM-locked, making it difficult to ``switch only the carrier''.
From October 2021, SIM locks have been banned in principle under the guidance of the Ministry of Internal Affairs and Communications. The current situation is that the transition from communication carriers (MNO) to low-cost SIM (MVNO) remains.
For those who want to use a smartphone regardless of the communication carrier, we recommend the "SIM-free smartphone (domestic model)" sold at Amazon, Rakuten Ichiba, and home appliance mass retailers. Smartphones sold with cheap SIM (MVNO) also fall under this category.
Most of the SIM-free smartphones sold in Japan are compatible with all communication bands of "docomo", "Softbank" and "au". However, since "Rakuten Mobile" is compatible, it is necessary to check separately on the official website.
With a SIM-free smartphone, you can choose a carrier based on "usage fee" and "service" instead of "communication band". It is also possible to increase convenience while lowering running costs. It is also ideal for "dual SIM operation" using two types of SIM.
In the case of a cheap SIM, the timing at which you can purchase a terminal is limited to "when you sign a SIM contract", but it is a great opportunity to reduce both the "communication fee" and "terminal fee", so be sure to Let's check if the terminal is handled or not. "OCN Mobile ONE" and "IIJmio" have high discount rates.
This time, I would like to introduce a cheap mobile service that goes well with recommended models that can be purchased in the 10,000 to 60,000 yen range from among such SIM-free smartphones with a high degree of freedom!
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