How to Set Up the Perfect Dual SIM Abroad: Data on eSIM and SMS on Your Physical SIM

Introduction: why Dual SIM is your best ally

Traveling with a mobile phone is always a challenge: your bank account needs to receive SMS, the maps app requires data, and of course you want to avoid roaming charges that make your credit card tremble. The solution lies in the Dual SIM: keep the physical card you already use at home to receive verification messages, while simultaneously activating an eSIM from ILoveEsim exclusively for browsing. The result is a seamless experience with no surprises on the bill.

Before you take off: technical checklist

These are the items you should check before buying your ticket. Checking each point ensures that the setup will work from day one.

Device compatibility: iPhone XS or newer, Samsung Galaxy S20 or higher, and most Android 10+ devices with Dual SIM (nano‑SIM + eSIM).
Physical SIM status: make sure the card is active, not PIN‑locked, and has enough balance to receive international SMS (most operators allow this at no cost).
ILoveEsim account: sign up and verify your email. You'll need a valid payment method to purchase the data plan.
Useful apps: install an SMS management app (e.g., Pulse SMS) and a lightweight VPN to protect your traffic when using public Wi‑Fi.
Updates: ensure that your mobile's operating system and firmware are up to date; some older versions have bugs when switching between SIM profiles.

Step by step: iPhone

iPhones handle Dual SIM very intuitively, but follow these steps to leave nothing to chance.

1. Insert your physical SIM: power off the phone, use the ejection tool and place the card in the tray. Turn the device back on.
2. Set SMS reception as default: go to Settings > Messages > Send & Receive and make sure your phone number (the one on the physical SIM) is checked under “You can be reached by”.
3. Add the ILoveEsim eSIM:
1. Open the ILoveEsim app, choose the destination country and the data plan.
2. Confirm the purchase and copy the generated QR code.
3. In Settings > Cellular > Add Cellular Plan, scan the QR code.
4. Assign data usage: once the profile is added, go to Settings > Cellular and select the eSIM as “Default Data Plan”. Turn off “Data Roaming” for the physical SIM.
5. Prioritize calls and SMS: under Settings > Phone > Default Line, choose the physical SIM. This way, all calls and SMS messages will go through it.
6. Verify functionality: send a message to your own number, or request a 2FA code from your bank. You should receive the SMS on the physical SIM while browsing with the eSIM.

Step‑by‑Step: Android (Physical Dual SIM + eSIM Mode)

Android varies by brand, but the logic is the same. Below is a generic guide that covers most recent devices.

1. Insert the physical SIM and confirm that the phone recognizes it in Settings > Connections > SIM Card Manager.
2. Download the ILoveEsim app from Google Play, choose your destination and purchase the data plan.
3. Install the eSIM:
1. From the app, select “Install eSIM”.
2. The Settings > Connections > eSIM menu will open. Scan the provided QR code.
4. Configure data usage: in Settings > Connections > Data Usage > SIM selection for data, choose the ILoveEsim eSIM.
5. Prioritize SMS and calls: under Settings > Connections > Calls > Default SIM, select the physical SIM.
6. Disable roaming for the physical SIM: on the same screen, turn off “Data roaming”. Keep “Data roaming” enabled only for the eSIM (most ILoveEsim plans already include roaming at no extra cost).
7. Test the flow: request a 2FA code and confirm it arrives to the physical SIM number. Open Chrome and verify that browsing uses the eSIM (in Settings > Network & Internet > SIM eSIM the eSIM should appear as active).

Critical Settings Comparison Table

Function	iPhone	Android	Pro Tip
SIM for SMS and Calls	Settings > Phone > Default Line (Physical SIM)	Settings > Connections > Calls > Default SIM (Physical SIM)	Always keep “Show My Number” enabled to prevent your contacts from seeing the eSIM number.
SIM for Mobile Data	Settings > Mobile Data > Default Plan (eSIM)	Settings > Connections > Data Usage > SIM Selection for Data (eSIM)	Enable “Data Usage Under Wi‑Fi” so the phone automatically switches to Wi‑Fi when the eSIM signal is weak.
Data Roaming	Disable on the physical SIM; keep enabled on the eSIM.	Disable on the physical SIM; keep enabled on the eSIM.	Check the “Data‑only Roaming” option if your eSIM plan allows it.
eSIM Profile Management	Settings > Mobile Data > Manage Plans	Settings > Connections > eSIM > Manage Profiles	Name each profile (e.g., “Spain‑Data”) to make quick switching easier on future trips.

Advanced Trick: Using the eSIM as a “Data Firewall”

Warning: some banks block authentication if the phone number is registered on a network that does not belong to the country of origin. If you receive a “Number not allowed” message, temporarily enable data roaming on the physical SIM just to receive the SMS and then disable it again.

Common Troubleshooting

I don't receive SMS on the physical SIM: verify that the local network signal is sufficient. In rural areas, switch to 2G/3G manually (iOS: Settings > Mobile Data > Mobile Data Options > Voice & Data).
The eSIM shows “No Coverage”: check that the data plan is active on your ILoveEsim account and that you have selected the eSIM as the default for data. Restart the phone.
Data usage spikes without reason: review which apps are using background data (Settings > Mobile Data > Data Usage) and disable the “Background App Refresh” option for non‑essential apps.

Advantages of separating SMS and data

By keeping SMS on the physical SIM, your usual number remains active, preventing banks from asking you to re‑verify your identity when they detect an unknown number. The eSIM, on the other hand, offers competitive local or regional rates, without the need to swap cards at every border. Moreover, you can download multiple eSIM profiles during a single trip and switch between them without having to buy new cards.

Recommended complementary apps

Combine Dual SIM with tools that enhance the travel experience:

SMS manager: Pulse SMS (Android) or iMessage (iOS) to centralize messages from both SIMs.
Lightweight VPN: ProtonVPN or Surfshark to encrypt eSIM traffic on public networks.
Offline maps: download areas in Maps.me before traveling; this reduces data consumption.
Battery manager: AccuBattery helps extend battery life when the eSIM is in continuous use.

Practical conclusion

With Dual SIM properly configured, you can travel with peace of mind knowing your banking codes will arrive without delay and your data usage will be as cheap as local. The process takes less than 15 minutes and, once done, you simply activate or deactivate the eSIM profile depending on the area you’re visiting. Remember that ILoveEsim provides 24/7 support for any issue.

Frequently Asked Questions (FAQ)

Can I use the ILoveEsim eSIM in multiple countries with a single plan?

Yes. ILoveEsim offers “regional” plans that cover several countries within the same bloc (e.g., Europe or Southeast Asia). The plan activates automatically when you switch networks.

What happens if I lose my phone with the physical SIM inserted?

Contact your carrier immediately to block the SIM. The eSIM will remain active, but without the physical card you won’t receive verification SMS. You can use the ILoveEsim app to deactivate the remote profile.

Does the eSIM consume more battery than a traditional SIM?

In general, the consumption is similar. What can affect it is the constant signal searching in areas with limited coverage; enabling “Data Saver” mode and turning off roaming data when you don’t need it helps preserve battery.

Can I use the physical SIM as the sole card again after the trip?

Absolutely. Simply deactivate the eSIM profile in Settings > Mobile Data and re-select the physical SIM as the “Default data plan”. There's no need to delete the profile; you can keep it for future destinations.

Do WhatsApp group messages arrive on the physical SIM or the eSIM?

WhatsApp messages are tied to the number you registered the account with. If your account is linked to the physical SIM number, verification SMS and group messages will continue to arrive on that line, even if you are using the eSIM.

Introduction: why Dual SIM is your best ally

Before you take off: technical checklist

These are the items you should check before buying your ticket. Checking each point ensures that the setup will work from day one.

Device compatibility: iPhone XS or newer, Samsung Galaxy S20 or higher, and most Android 10+ devices with Dual SIM (nano‑SIM + eSIM).
Physical SIM status: make sure the card is active, not PIN‑locked, and has enough balance to receive international SMS (most operators allow this at no cost).
ILoveEsim account: sign up and verify your email. You'll need a valid payment method to purchase the data plan.
Useful apps: install an SMS management app (e.g., Pulse SMS) and a lightweight VPN to protect your traffic when using public Wi‑Fi.
Updates: ensure that your mobile's operating system and firmware are up to date; some older versions have bugs when switching between SIM profiles.

Step by step: iPhone

iPhones handle Dual SIM very intuitively, but follow these steps to leave nothing to chance.

1. Insert your physical SIM: power off the phone, use the ejection tool and place the card in the tray. Turn the device back on.
2. Set SMS reception as default: go to Settings > Messages > Send & Receive and make sure your phone number (the one on the physical SIM) is checked under “You can be reached by”.
3. Add the ILoveEsim eSIM:
1. Open the ILoveEsim app, choose the destination country and the data plan.
2. Confirm the purchase and copy the generated QR code.
3. In Settings > Cellular > Add Cellular Plan, scan the QR code.
4. Assign data usage: once the profile is added, go to Settings > Cellular and select the eSIM as “Default Data Plan”. Turn off “Data Roaming” for the physical SIM.
5. Prioritize calls and SMS: under Settings > Phone > Default Line, choose the physical SIM. This way, all calls and SMS messages will go through it.
6. Verify functionality: send a message to your own number, or request a 2FA code from your bank. You should receive the SMS on the physical SIM while browsing with the eSIM.

Step‑by‑Step: Android (Physical Dual SIM + eSIM Mode)

Android varies by brand, but the logic is the same. Below is a generic guide that covers most recent devices.

1. Insert the physical SIM and confirm that the phone recognizes it in Settings > Connections > SIM Card Manager.
2. Download the ILoveEsim app from Google Play, choose your destination and purchase the data plan.
3. Install the eSIM:
1. From the app, select “Install eSIM”.
2. The Settings > Connections > eSIM menu will open. Scan the provided QR code.
4. Configure data usage: in Settings > Connections > Data Usage > SIM selection for data, choose the ILoveEsim eSIM.
5. Prioritize SMS and calls: under Settings > Connections > Calls > Default SIM, select the physical SIM.
6. Disable roaming for the physical SIM: on the same screen, turn off “Data roaming”. Keep “Data roaming” enabled only for the eSIM (most ILoveEsim plans already include roaming at no extra cost).
7. Test the flow: request a 2FA code and confirm it arrives to the physical SIM number. Open Chrome and verify that browsing uses the eSIM (in Settings > Network & Internet > SIM eSIM the eSIM should appear as active).

Critical Settings Comparison Table

Function	iPhone	Android	Pro Tip
SIM for SMS and Calls	Settings > Phone > Default Line (Physical SIM)	Settings > Connections > Calls > Default SIM (Physical SIM)	Always keep “Show My Number” enabled to prevent your contacts from seeing the eSIM number.
SIM for Mobile Data	Settings > Mobile Data > Default Plan (eSIM)	Settings > Connections > Data Usage > SIM Selection for Data (eSIM)	Enable “Data Usage Under Wi‑Fi” so the phone automatically switches to Wi‑Fi when the eSIM signal is weak.
Data Roaming	Disable on the physical SIM; keep enabled on the eSIM.	Disable on the physical SIM; keep enabled on the eSIM.	Check the “Data‑only Roaming” option if your eSIM plan allows it.
eSIM Profile Management	Settings > Mobile Data > Manage Plans	Settings > Connections > eSIM > Manage Profiles	Name each profile (e.g., “Spain‑Data”) to make quick switching easier on future trips.

Advanced Trick: Using the eSIM as a “Data Firewall”

Warning: some banks block authentication if the phone number is registered on a network that does not belong to the country of origin. If you receive a “Number not allowed” message, temporarily enable data roaming on the physical SIM just to receive the SMS and then disable it again.

Common Troubleshooting

I don't receive SMS on the physical SIM: verify that the local network signal is sufficient. In rural areas, switch to 2G/3G manually (iOS: Settings > Mobile Data > Mobile Data Options > Voice & Data).
The eSIM shows “No Coverage”: check that the data plan is active on your ILoveEsim account and that you have selected the eSIM as the default for data. Restart the phone.
Data usage spikes without reason: review which apps are using background data (Settings > Mobile Data > Data Usage) and disable the “Background App Refresh” option for non‑essential apps.

Advantages of separating SMS and data

Recommended complementary apps

Combine Dual SIM with tools that enhance the travel experience:

SMS manager: Pulse SMS (Android) or iMessage (iOS) to centralize messages from both SIMs.
Lightweight VPN: ProtonVPN or Surfshark to encrypt eSIM traffic on public networks.
Offline maps: download areas in Maps.me before traveling; this reduces data consumption.
Battery manager: AccuBattery helps extend battery life when the eSIM is in continuous use.

Practical conclusion

Frequently Asked Questions (FAQ)

Can I use the ILoveEsim eSIM in multiple countries with a single plan?

Yes. ILoveEsim offers “regional” plans that cover several countries within the same bloc (e.g., Europe or Southeast Asia). The plan activates automatically when you switch networks.