Can you use eSIM and physical SIM at the same time? 

You can use eSIM and physical SIM at the same time as long as your device has dual SIM functionality. Many modern smartphones, including most newer iPhones and Android devices, are equipped with dual SIM technology, which means you can use both an eSIM and a SIM card at the same time. 

To enable this setup, you’ll need to ensure your device supports dual SIM, then activate both SIMs through your phone’s settings. Start by inserting your physical SIM into its designated slot, then scan the eSIM QR code provided by your carrier to activate the eSIM. Once both are activated, you can customize which SIM handles specific tasks, such as data usage, calls, and texts, from your phone’s settings.

This guide will explore everything you need to know about using an eSIM physical SIM simultaneously. We’ll discuss the benefits, how to set up and manage your SIMs, and why you might need to use this feature.

What is dual SIM functionality?

Dual SIM functionality is a feature that allows a single device to use SIM profiles simultaneously, enabling users to manage two phone numbers or plans on the same phone. Traditionally, this was achieved by inserting two physical SIM cards into a dual SIM tray. However, with advancements in technology, many modern devices now also support eSIM as one of the two SIM options.

Dual SIM functionality allows you to enjoy the benefit of two networks, which can be useful for:

• Travelers, who can keep their home SIM active for calls while using a local eSIM for affordable data.
• Work-life balance, where one SIM is dedicated to personal use and the other for work.
• Enhanced network coverage, by connecting to two carriers for better service in different locations.

Modern devices with dual SIM capabilities often let users customize how to use each SIM and when. As a result, you get far more flexibility when it comes to using your data plans.

Limits and requirements to use SIM and eSIM together with dual SIM

Using a physical SIM and an eSIM together can be a game-changer, but there are specific limits and requirements to consider.

For example, you’ll need:

• A compatible device: Not all devices are eSIM-compatible. Fortunately, iPhones from the iPhone XS onward, and most high-end or newer Android phones support eSIM, and many also support dual SIM technology.
• The right operating system: Ensure your device is running on the latest software update. Dual SIM support might not work unless your device is up-to-date.
• The right carrier: Both your eSIM and physical SIM must be supported by carriers that offer dual SIM functionality. Not all carriers provide eSIM services or support dual SIM setups.

If you have all three things, you should be able to use both SIM profiles with ease. However, there are some limits that might affect your experience, including:

• Network selection: While dual SIM lets you connect to two networks, most devices only allow one SIM to use mobile data at a time, while the other is limited to calls and texts.
• 5G support: On some devices, using dual SIM functionality may limit one or both SIMs to 4G or 3G networks, even if both support 5G individually. Check your phone’s specifications for dual SIM 5G compatibility.
• Battery usage: Running two active SIMs can significantly drain your device’s battery, as it must maintain connections to two networks simultaneously.
• Roaming conflicts: When traveling internationally, only one SIM may be allowed to roam depending on the carrier settings and agreements.
• Custom settings for calls and data: Devices require manual configuration to assign specific tasks to each SIM, like calls and texts. Misconfigurations might lead to unintended charges or connectivity issues.

As long as you understand these limitations, you can optimize your dual SIM setup to get the most out of your device’s capabilities.

How to set up and use eSIM and SIM card at the same time

Setting up and using an eSIM alongside a physical SIM means you can manage multiple plans, but you’ll need to set it up correctly to ensure you make the most of it.

Getting started

Firstly, insert your physical SIM into its designated slot. With most phones, activation is automatic.

Then, activate your eSIM by scanning the QR code provided by your carrier, or by following their app-based activation process.

Once both SIMs are active, you can begin customizing their settings to optimize your experience.

Set a label to your plan

Assigning labels helps you distinguish between your eSIM and physical SIM, making it easier to manage calls, texts, and data.

1. Open Settings on your device.
2. Navigate to Cellular (on iPhone) or Network & Internet then SIMs (on an Android).
3. Tap on each SIM or eSIM line, and assign a label like “Personal” or “Work.”

Turn on your eSIM

Ensure your eSIM is activated and ready to use in your settings. The process for doing this varies slightly on Android and iPhone, and it can also depend on your carrier. However, you can generally follow these steps.

1. Go to Settings. On an iPhone, tap Cellular. On an Android, go to Mobile Network or Network & Internet (depending on your device).
2. Tap on your eSIM profile.
3. Toggle On to enable the eSIM.

Set a default voice line

You’ll then need to choose which SIM or eSIM you want to use for calls and texts by default. This will be the line that you use to send and receive calls and text messages.

1. Open Settings, then find Cellular or Network & Internet. Locate your SIM card manager.
2. Select Default Voice Line or Preferred SIM for Calls.
3. Choose the SIM or eSIM you want to use for voice calls by default.

Set a mobile data line

Next, you’ll need to do the same thing for your data, selecting which line to use for internet usage. Notably, this line will also be used for things like iMessage and FaceTime, which work using data.

1. Open Settings, then find Cellular or Network & Internet. Locate your SIM card manager.
2. Select Mobile Data.
3. Choose the SIM or eSIM you want to use for voice calls by default.
4. For devices supporting Dual Sim Dual Standby (DSDS), you may have the option to allow data switching. This lets your device switch between SIMs for better coverage. If you want to do this, toggle On.

How to swap between eSIM and physical SIM

Switching between an eSIM and a physical SIM is really straightforward, and it allows you to alternate between network or plans depending on your needs. If you’re having trouble deciding which line to use for which purpose, it’s worth learning the difference between a physical SIM and an eSIM.

Generally, you’ll need to consider:

• Convenience: eSIMs are more convenient since they’re embedded in your device and don’t require physical handling. Swapping between networks is done digitally, often without needing to remove or insert a card.
• Flexibility: eSIMs allow you to store multiple plans on your device, making it easier to switch without physically swapping cards.
• Durability: Physical SIMs can be lost, damaged, or worn out, while eSIMs are unaffected by [physical wear.

If you want to change lines, the steps are different on an iPhone and an Android.

On an iPhone:

1. Open Settings and go to Cellular.
2. Tap Cellular Plans, and you should see both your eSIM and physical SIM listed.
3. Select Cellular Data, then choose the plan you want to use for data.
4. For calls and texts, go to Default Voice Line and select your chosen plan.
5. Toggle the active eSIM on or off if necessary, ensuring only the plan you wish to use is active.

On an Android:

1. Open Settings, then go to Network & Internet.
2. Select SIM Card Manager to view your active SIMs.
3. Assign the desired SIM or eSIM for calls, messages, and data by choosing it as the default for each function.
4. Disable the inactive SIM if needed by toggling it Off.

What are the benefits of using SIM and eSIM at the same time?

Using a SIM and eSIM together offers significant advantages for users who need flexibility and enhanced connectivity. Here are some of the key benefits:

• Dual numbers: Manage personal and work numbers on the same device without carrying two phones.
• Improved network coverage: Connect to two different networks, ensuring better coverage in areas where one carrier might have weak signal strength.
• Cost-effective travel: Keep your primary SIM for calls and texts while using an eSIM for affordable local data plans when abroad.
• Seamless switching: Quickly toggle between SIMs for specific tasks, such as using one for data and the other for calls.
• Convenience for travelers: Avoid the hassle of swapping physical SIM cards when moving between countries or regions.
• Customizable usage: Assign specific functions–like calls, SMS, or data–to either the SIM or eSIM, tailoring the setup to your needs.

Using eSIM and physical SIM at the same time – FAQs 

Alessia Copolla

I’m Alessia Coppola, and I combine my love for writing with a passion for travel and staying connected. Through my work, I guide readers to the best solutions for staying connected while on the move, covering options like eSIMs, SIMs, and pocket Wi-Fi. My goal is to help travelers stay connected easily and seamlessly, no matter where they are in the world.