How to Switch Between eSIM and Physical SIM: iPhone & Android Guide

You don't need to remove your physical SIM every time you want to use an eSIM.

On a Dual SIM phone, both lines can often stay installed and active. You simply choose which one handles calls, texts, or mobile data.

That's useful when traveling. You can keep your physical SIM active for your regular number, SMS, and bank codes while using an eSIMCard travel eSIM for mobile data.

Switching lines is usually done from your phone's settings. It doesn't mean deleting your eSIM or converting your physical SIM.

This guide explains how to switch between an eSIM and a physical SIM on iPhone and Android, using current device settings to help you manage calls, messages, and mobile data correctly.

What Does Switching Between eSIM and Physical SIM Mean?

Switching SIMs can mean a few different things. You might want your eSIM to handle mobile data while your physical SIM stays active for calls. Or you may want to temporarily turn one line off.

On most Dual SIM phones, you can control these functions separately:

1. Mobile data
2. Calls
3. SMS or messages
4. Active or inactive line
5. Roaming settings

So switching to eSIM doesn't necessarily mean your physical SIM stops working. Both lines can stay on the phone. You just choose what each one does.

Can You Use an eSIM and Physical SIM at the Same Time?

Yes, if your phone supports Dual SIM. Many current iPhones and Android phones let you keep a physical SIM and eSIM active together.

This is commonly called Dual SIM Dual Standby, or DSDS. Both lines can stay available, although exactly how calls and data work depends on the phone and carrier.

Only one line is normally selected as the main mobile-data line at a time.

You don't have to use the lines this way, but it's a handy setup for international travel.

How to Switch Between eSIM and Physical SIM on iPhone

Apple's Dual SIM feature lets you manage your cellular lines from Settings.

1. Open: Settings > Cellular.
2. Depending on your region or iOS version, the menu may also appear as Mobile Data or Mobile Service.
3. Check that both your physical SIM and eSIM are listed and turned on.
4. To choose which line handles mobile data, open Cellular Data > Select your preferred line.
5. For calls, look for: Default Voice Line.
6. Choose the physical SIM or eSIM you want to use as your default calling line.
7. It's also worth giving each line a clear name. Labels such as Personal, Home, Travel, or eSIMCard are much easier to understand than Primary and Secondary.
8. Finally, check Allow Cellular Data Switching.

That setting can affect which line your iPhone uses for data in supported situations.

How to Switch Mobile Data Between SIMs on iPhone

Want to move mobile data from your physical SIM to your eSIM? Go to: Settings > Cellular or Mobile Data > Cellular Data.

Choose the line you want to use. If you're traveling with eSIMCard, select your eSIMCard line here after you arrive.

Your physical SIM can remain active for calls or SMS without handling your mobile data. Check Allow Cellular Data Switching too.

If you want strict control over which SIM uses data abroad, turning this setting off can help prevent the phone from using the other line unexpectedly.

Keep Data Roaming off on your home SIM if you don't want home-carrier data roaming.

How to Switch Calls and Messages Between SIMs on iPhone

Your data line and voice line don't have to be the same. Under your cellular settings, choose a Default Voice Line for outgoing calls.

iPhone can also remember which line you last used with specific contacts. Messages can depend on your chosen line, contact history, and iMessage settings.

Changing your mobile-data line doesn't automatically move every call or text to that SIM. That's useful when traveling.

You can keep your normal number available on the physical SIM while your travel eSIM handles internet access.

Also check your iMessage and FaceTime settings if you want to confirm which phone number or Apple Account is being used.

How to Switch Between eSIM and Physical SIM on Android

Android settings vary by phone brand. The main idea is the same, though. Look under: Settings > Network & Internet > SIMs

Or: Settings > Connections > SIM Manager. From there, many Android phones let you choose a preferred SIM for:

1. Calls
2. Messages
3. Mobile data

On Samsung Galaxy phones, the menu is usually found under: Settings > Connections > SIM Manager.

Google Pixel users generally find it under: Settings > Network & Internet > SIM.s

Google also provides official instructions for managing Dual SIM phones and selecting the default SIM for calls, texts, and data.

Don't worry if the wording on your phone looks slightly different. Manufacturers often rename these menus.

How to Switch Mobile Data Between SIMs on Google Pixel

1. On a supported Pixel phone, open: Settings > Network & Internet > SIMs
2. Look for the mobile data preference and select the SIM you want to use.
3. Only one SIM is normally selected as the default mobile data SIM.
4. You can keep another line active for calls or texts.
5. Pixel phones may also offer Automatic data switching on supported models and carrier setups.
6. If you're traveling and want your travel eSIM to handle all mobile data, review this setting before leaving the home SIM active.

How to Switch SIMs on Samsung

Samsung phones usually keep SIM controls under: Settings > Connections > SIM Manager.

If your Samsung supports Dual SIM, you'll normally see your available physical SIM and eSIM lines there.

You may be able to choose separate preferences for:

1. Calls
2. Messages
3. Mobile Data

Set the eSIM as your Mobile Data line if that's the connection you want to use. Samsung menu names can change between Galaxy models and One UI versions, so the exact wording may be slightly different on your phone.

Can One SIM Handle Calls While the Other Uses Data?

Yes, on many Dual SIM phones. That's one of the main reasons Dual SIM is useful.

Say you're traveling in Spain. Your setup could look like this:

1. Physical SIM: your normal phone number, SMS, bank OTPs, and selected calls.
2. eSIMCard: mobile data for Google Maps, WhatsApp, rideshare apps, email, and browsing.
3. You don't have to move everything to the travel eSIM.
4. In fact, separating voice and data can make things easier when you still need access to your home number.
5. Just remember that your home carrier may still charge for calls or other roaming activity.

Travelers can use an eSIM for Spain for mobile data while keeping their physical SIM active for their regular number.

What Is Cellular Data Switching?

Cellular Data Switching lets a phone use another SIM for data in supported situations. On iPhone, the setting is called: Allow Cellular Data Switching.

Some Pixel phones use: Automatic data switching. This can be useful at home, but travelers often prefer more control.

Imagine your eSIM has weak coverage for a moment. You may not want your phone using the home SIM's roaming data instead.

When traveling, check three things: Your travel eSIM should be selected for mobile data. Your home SIM's Data Roaming should normally stay off if you don't want roaming data charges.

And consider disabling automatic data switching if you want your travel eSIM to remain the only data line.

How to Use eSIMCard With Your Physical SIM While Traveling

You can keep your normal SIM in your phone while using eSIMCard for travel data. Before your trip, install your eSIMCard plan while you have reliable Wi-Fi.

Once you arrive, open your SIM or cellular settings and select eSIMCard as the mobile data line.

Keep your physical SIM active if you still need its phone number for SMS, OTPs, or calls. But don't forget the roaming settings.

Keep Data Roaming off on the home SIM if you don't want it using roaming data. Your eSIMCard plan may need Data Roaming turned on for the eSIM line, depending on the plan and network. Follow the setup instructions supplied with your plan.

If your phone has automatic data switching, consider turning it off during the trip. That gives you tighter control over which SIM is using data.

How to Temporarily Turn Off an eSIM or Physical SIM

You don't have to delete a SIM just because you aren't using it. Most Dual SIM phones let you turn a line off temporarily.

1. On iPhone, open the line under Cellular settings and switch off Turn On This Line.
2. On supported Android phones, open the SIM settings and disable the line.
3. The SIM or eSIM profile stays on the device.
4. When you need it again, simply turn the line back on.

This is especially useful with a travel eSIM. You might want to keep the profile installed while temporarily returning to your home SIM.

Should You Delete an eSIM When Switching Back to Your Physical SIM?

Usually no. Turn it off instead. Switching back to your physical SIM doesn't require you to delete the eSIM.

Deleting removes the eSIM profile from the phone. And that matters because some eSIM profiles have restrictions on reinstallation.

If you may need the eSIM again, leave it installed and turn the line off. Delete it only when you're sure you're finished with that profile and understand the provider's reinstallation rules.

Switching vs Converting a Physical SIM to eSIM

These two actions sound similar, but they're not the same.

Switching simply changes which installed line you use. Conversion changes the form of an existing cellular line from a physical SIM to an eSIM.

After a supported conversion, the old physical SIM may stop working because the carrier line has moved to the eSIM.

Don't choose Convert to eSIM if all you want to do is use another installed SIM for mobile data.

Can You Use Two eSIMs at the Same Time?

On some phones, yes. Support depends on the device and carrier.

Newer supported iPhones can run two active eSIMs instead of using one physical SIM and one eSIM.

Some Google Pixel models also support two active eSIM profiles when the device and carrier support the feature.

But don't assume every eSIM phone can do this. Some devices can store several eSIM profiles but only keep one eSIM active at a time.

Check whether your phone is eSIM-compatible before planning a dual-eSIM setup.

What If the Wrong SIM Keeps Using Mobile Data?

Start with your SIM settings.

If you're traveling, check the home SIM first. Make sure it isn't selected as the mobile data line and that Data Roaming is off unless you intentionally want to use it abroad.

Then check that your travel eSIM is turned on and selected for data. Don't delete the eSIM as your first fix.

Conclusion

Using an eSIM alongside a physical SIM doesn't have to mean choosing one and getting rid of the other.

Keep both installed, decide which line handles calls and texts, then choose the one you want for mobile data.

For travel, a simple setup works well: keep your home SIM for your regular number and use eSIMCard for mobile data abroad.

Check your roaming and automatic data-switching settings before you leave. Then switching between your lines takes only a few taps.

FAQs

How Do I Switch Between eSIM and Physical SIM?

Open your phone's cellular or SIM settings and choose which installed line should handle mobile data, calls, or messages.

Can I Use an eSIM and Physical SIM at the Same Time?

Yes, if your phone supports Dual SIM. Many compatible phones can keep both lines active while assigning different jobs to each.

Can One SIM Handle Calls and Another Mobile Data?

Yes. On many Dual SIM phones, one line can handle calls and SMS while the other is selected for mobile data.

Does Switching to eSIM Disable My Physical SIM?

No. Simply switching between installed lines doesn't normally disable your physical SIM. Converting a physical SIM to eSIM is a separate process.

Should I Delete My eSIM When Switching Back to My SIM?

Usually no. Turn the eSIM off instead if you may need to use it again later.

Can I Use Two eSIMs at the Same Time?

Some devices can. Supported newer iPhones and certain Pixel phones can run two active eSIMs, depending on device and carrier support.

Will Switching SIMs Change My WhatsApp Number?

Usually no. Changing the SIM used for mobile data doesn't automatically change the phone number registered with your WhatsApp account.

Why Is My hone Using the Wrong SIM for Data?

Check which SIM is selected for mobile data. Also review Cellular Data Switching or Automatic Data Switching and make sure the intended line is enabled.