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From September 8th, ahamo is compatible with eSIM.

In this article, we will explain the procedure for switching from a SIM card to an eSIM when changing models.

What is eSIM?

SIM is an abbreviation for “Subscriber Identity Module” and refers to an IC chip that records subscriber information and mobile phone numbers to identify subscribers.

Since it is usually a small card type, it is called a SIM card, and smartphones can make calls and connect to the Internet by inserting this SIM card.

On the other hand, eSIM is a built-in SIM that is embedded in the smartphone in advance.

Information is not written when the smartphone is shipped, and by downloading the necessary information and writing it later, you will be able to communicate as usual.

Although IT literacy is required to allow online application and setting work, it is convenient to be able to make contracts and settings at any time and place .

Since there is no need to replace the SIM card, you can start using it smoothly without waiting for the SIM card to arrive when you change carriers.

How to make effective use of eSIM

It is convenient to be able to eliminate the waiting time at the time of line contract, but there are many people who do not feel much benefit at this level.

The unique way to use eSIM is to use dual SIM.

What is Dual SIM?

Dual SIM is a function that uses two SIMs with one smartphone.

Normally, you need to use a smartphone that has two slots for inserting a SIM card, but you can make it dual SIM by using a SIM card and eSIM together .

With dual SIM, you can switch SIMs to make voice calls and data communications .

Each SIM has a different phone number, but it can stand by at the same time, so it is possible to answer whichever number you receive.

However, while one SIM is making a call or communication, the other SIM will be out of service.

This will affect if you receive another call during a call, or if you receive a call with another SIM while downloading data.

(There is also a format called DSDA that allows you to use both SIMs at the same time, but most of the models released in Japan do not support it.)

If you have two smartphones for private use and one for work and use different phone numbers, you can use dual SIM to perform the same operation with one smartphone.

Unlimited calls for free using Rakuten Mobile!

ahamo includes unlimited voice calls within 5 minutes in the plan.

Short calls are fine, but if you take more than 5 minutes, you will be charged 20 yen per 30 seconds.

You can use the flat-rate option that allows you to make unlimited calls for an additional 1,000 yen, but you can also make cheap calls by using dual SIM .

Especially recommended is the combination with Rakuten Mobile.

The charge for Rakuten Mobile “Rakuten UN-LIMIT VI” is a step-by-step system that varies according to the amount of data used, and is free if the communication volume is up to 1GB.

Furthermore, by using the “Rakuten Link” app, you can make unlimited domestic calls for free, so Rakuten Mobile does not charge for calls only.

Therefore, by using Rakuten Mobile with dual SIM, you can make unlimited calls at no additional charge .

Even if you use communication, it is cheaper than adding capacity with ahamo, so it is also useful as a backup line when the communication volume exceeds 20GB.

Use data communication flexibly with povo2.0!

Povo developed by KDDI as the same online-only cheap plan as ahamo will be reborn as povo 2.0 from the end of September.

The biggest change is that the monthly data communication capacity has been changed to a prepaid format that can be used for a certain period from the purchase, and the basic charge is 0 yen .

Like Rakuten Mobile, the plan with no basic charge is very suitable for use as a secondary SIM line.

povo2.0 has short-term, small-capacity data toppings such as “All-you-can-use data for 24 hours for 330 yen” and “Data communication up to 3GB for 990 yen”. , It is possible to increase the communication capacity at low cost .

For example, it is effective to use topping when communicating with a substitute capacity for pinpoint communication such as when you are on a business trip and want to connect multiple devices to the Internet using tethering on the go, or when you want to enjoy watching videos in your free time at your travel destination. is.

eSIM compatible models

It has been several years since eSIM appeared, and most of the latest models today support eSIM.

For iPhone, it was first installed in iPhone XS, iPhone XS Max, and iPhone XR released in 2018.

However, there are still few compatible models, and only iPhone and iPad are supported.

It is planned to expand gradually, but it seems that it will take some time to use it on Android smartphones and also used AT&T Insurance.