You need dual eSIM because the iPhone 14 series begins to cancel the physical card slot, or facilitates switching between work and private numbers, and use local packages abroad. The steps to add a second eSIM are: Open Settings > Cellular Network > Add eSIM, scan the QR code or manually enter the information, and select the primary and secondary number. Practical settings include: distinguishing uses, switching data main number, setting the SMS address, and closing the number without using the number to save power. Notes include: operators need to support multiple eSIMs, avoid conflicts between two operator numbers, confirm model support, and avoid frequent switching of primary and secondary numbers.

The dual eSIM function on iPhone has actually been launched for a while, but many people still don’t know how to use it, or they are afraid of complex settings and dare not try it. In fact, it can be done in just a few steps, and it can save the card slot and facilitate switching numbers when traveling on business or traveling.

Why do you need dual eSIM

Now many iPhones (starting from the iPhone 14 series) have cancelled the physical SIM card slot and rely entirely on eSIM. Even for models with card slots, if you have two numbers to be online at the same time (such as one work number and one private number), or don’t want to change cards when going abroad or use a local operator package, eSIM is a very convenient choice.

And unlike before, where two physical cards are inserted, eSIM does not take up physical space and is also thinner. However, it should be noted that the support for eSIM may be different in different countries and regions, and some operators do not support activation of multiple eSIMs.

How to add a second eSIM

It is actually not difficult to add a second eSIM. The key is to prepare the QR code or activation information provided by the operator:

• Open Settings > Cellular Network
• Click "Add eSIM"
• Use the camera to scan the QR code given to you by the operator (you can also manually enter information)
• Wait for a few seconds and you will be prompted if it is a "main number" or a "secondary number"

Once you're done, you can see two numbers in the cellular network list. Each number can have a default voice, data and SMS service set separately.

Note: Not all carriers allow you to use two of their eSIMs on a phone, some will limit only one active number.

Some practical settings in use of dual eSIM

Once you have set up two eSIMs, the next step is how to use them flexibly:

• Differentiate uses : You can set one as the main number to make calls and send text messages, and the other is specifically used for data traffic.
• Switch the main data number : In "Settings" > "Cellular Network" > "Cellular Data", choose which number you want to use to access the Internet.
• Incoming calls and SMS Attachment : You can specify which number to use to receive incoming calls or send SMS in the "Tel" and "Message" settings respectively.
• Save power by turning off unused numbers : If a number is not needed for the time being, you can set it to "off" so that it will not consume power or deduct monthly rent by mistake.

In addition, iOS itself will also optimize the connection status according to your usage habits, such as keeping only the currently used numbers active.

Frequently Asked Questions and Notes

Some people find that one of the numbers cannot be used after setting them up, or they cannot connect to the Internet, which may be because:

• The operator has not activated the eSIM
• The current region does not support roaming services for this number
• Both numbers are from the same operator, causing conflicts
• iPhone models do not support dual eSIM (such as some models in the US version)

Also, Apple's official suggests not to frequently switch main and secondary numbers, especially if the settings of calls and text messages are frequently changed, which may sometimes lead to synchronization delays or the verification code cannot be received.

In general, dual eSIM is already very mature on iPhones. As long as you confirm that the operator supports and the equipment meets the requirements, it will not be troublesome to operate. The key is to not forget to check the number corresponding to each function after the settings are completed to avoid making the wrong calls or using the wrong traffic. Basically all that is it, and it will be easy to use every day after setting it up.

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