Before You Go & Abroad: Turning Off Your Home Line While Using an eSIM

Last updated: August 5, 2026 (Information verification date)

After adding an eSIM for your destination, many people wonder "Should I keep my home-country line active?" In dual SIM setups, both your home-country line and the eSIM appear side-by-side on the screen, which can make it unclear how to manage each one. If you don't plan to use your home-country line during your stay, the safest approach is to disable not just roaming but your home-country line itself (turning off the line / not using that SIM). This method reduces the risk of unintended data usage. This article walks you through the specific steps to do this, along with important checks before disabling, easily overlooked settings, and how to restore your settings after returning home.

Going beyond "disable roaming" for peace of mind abroad

Disabling roaming is an effective step. However, it only prevents your home-country line from connecting to networks overseas—the line itself remains "active and waiting." With roaming off, your line may still receive incoming calls, SMS messages, and carrier-specific services. There's also a risk that settings may revert after a restart or while configuring your device.

Roaming settings control whether your device connects to overseas networks for data. This is separate from disabling the line entirely. Additionally, your device has a higher-level setting: "which line should handle mobile data?" If this points to your home-country line instead of your eSIM, you might feel like "the setting didn't work."

If you don't plan to use your home-country line during your stay, disabling the line entirely makes your device's state clearer and means you won't need to revisit settings multiple times while traveling. With only your eSIM active, all mobile data will flow through it.

Which plan fits this trip?

Tell us where and for how long. We suggest the eSIM that fits: not too much, never too little.

DestinationDaysShow my plan

Bloomy, our support AI, answers from real plans and current prices.

Compare the three states of your home-country line

Even though we use the word "off," the result depends on which setting you disable. Understanding the full picture helps prevent confusion.

Home-Country Line State	Mobile Data	Incoming Calls & SMS	Typical Use While Abroad
Line On + Roaming On	Active (charges apply based on your plan)	Received	Using your home-country line's international plan
Line On + Roaming Off	Typically blocked	Received (charges depend on your carrier's terms)	Want to receive calls/SMS but use eSIM for data
Line Disabled (SIM not in use)	Not active	Not received	You've decided not to use your home-country line during your stay

Charges and conditions vary by carrier and plan. For the most current details, check your carrier's official documentation (as of August 2026).

How to disable your home-country line on iPhone

It's best to install your eSIM first so you won't lose connectivity while making changes. Here's the general process:

1. Open Settings → Mobile Data (or Cellular).
2. Select your home-country line from the list (identified by carrier name or your custom label).
3. Turn off "Turn on This Line."
4. Make sure "Roaming" remains off on the same screen.
5. Return to the list and confirm that "Mobile Data" is set to your eSIM.
6. Select your eSIM and verify its roaming setting matches your plan's setup instructions.

Also check "Allow Mobile Data Switching." If it's on, turn it off to prevent automatic switching to your home-country line if one connection weakens. This feature is convenient domestically but can unintentionally route traffic through the wrong line while abroad. Note that menu titles and positions may vary slightly depending on your iOS version.

How to disable your home-country line on Android

Android labels these options differently depending on the device manufacturer and OS version, but the concepts are the same. Focus on two things: "disable your home-country line" and "set your eSIM as your mobile data line."

1. Open Settings → Network & Internet → SIM (or "Mobile Network," "SIM Manager," etc.).
2. Select your home-country line and turn off the "Use SIM," "Enabled," or similar toggle.
3. Make sure "Roaming" and "Data Roaming" remain off on the same screen.
4. Confirm that your eSIM is set as the mobile data line. Look for "Preferred SIM" or "Use This SIM for Mobile Data" to verify it points to your eSIM.
5. Double-check your eSIM's roaming settings according to your plan's setup guide.

Different manufacturers use names like "Dual SIM" or "SIM Manager." If you can't find the option, try searching "SIM" in your Settings app's search bar. If that doesn't help, check your device manufacturer's official support site for your model number and "eSIM setup." If you're unsure whether your phone supports eSIM, visit our eSIM-compatible devices page first.

Other settings worth reviewing

Even after adjusting your line settings, apps can still use data. Since unexpected usage is a common reason data depletes faster than expected, it's worth reviewing these settings before you leave.

Easy to Overlook	What Can Happen	Action Before Travel
Mobile Data Line Priority	If your eSIM isn't set as the default, your home-country line may be used	Select your eSIM and turn off automatic switching
Your Home-Country Line's Roaming	With the line still active, it's unclear which one is being used	Disable both roaming and the line's mobile data
App Auto-Updates & Background Refresh	Apps update without your notice, draining data quickly	Turn off; allow updates only over Wi-Fi
Photos & Cloud Auto-Backup	Large file syncs consume data rapidly	Change to Wi-Fi-only sync
Tethering (Personal Hotspot)	Your companion's devices connect, consuming more data than expected	Check your plan's tethering policy and disable if not needed

Three things to verify before disabling your line

Once disabled, your home-country line won't receive incoming calls or SMS. Before you leave, it's worth checking that this won't create problems.

• Incoming Calls & SMS: If you expect calls or messages from work, school, or family during your stay, you may want to keep your line active for those periods only.
• SMS Authentication Codes: Some banks, investment services, and other apps send verification codes via SMS. If you can't receive these, you may not be able to complete transactions. Check each service's official guide to see if you can switch to app-based authentication or other methods before you leave. Options vary by service.
• Voicemail, Call Forwarding, & Carrier Services: Behavior depends on your carrier's terms. If you use these, verify the current conditions on your carrier's official site so you're not caught off guard.

If you need to receive calls or SMS, consider keeping your line active but disabling roaming only. In that case, confirm charges for incoming calls and SMS with your carrier before you leave.

Who should disable their line / who should keep it active

There's no "right" answer—it depends on whether you'll use your home-country number during your stay. If your trip only requires data for maps, messaging apps, and browsing, disabling your line makes the state clearer and budgeting easier.

Disabling your line works best if:

• You're taking a short trip or business travel where maps, search, and app-based messaging cover your needs
• You prefer simplicity and want a clear picture of what's active
• This is your first time traveling internationally and you want a straightforward setup
• You've had past incidents where your home-country line consumed data without your knowledge

Keep your line active if:

• Your work or family situation requires receiving calls on your home-country number
• You need to complete SMS-based authentication during your stay
• You're taking an extended stay and want to keep your home-country number active while using your eSIM

Whether your home-country line receives calls abroad and how it's charged depend on your carrier's terms. Check your carrier's official documentation for the latest details before you leave.

You disabled your line but still see charges—what to check

If charges appear even after reviewing your settings, other factors may be at play. Common scenarios include brief usage just before departure or after arrival, a different line being used by mistake, or billing and usage dates falling in different cycles.

We've outlined the troubleshooting steps in Why am I being charged even though I disabled roaming? Troubleshooting steps. If your bill looks unexpected, work through those steps in order. This article covers prevention; if you want to check whether your device is actively using data, also see our No connection or unusual behavior? Troubleshooting guide.

After you return home: restoring your settings

Any settings you changed before traveling need to be reverted after you return. Forgetting this step is a common reason people find their phone in "no signal" or non-functional when they're back home.

1. Re-enable your home-country line
2. Set your home-country line as your mobile data line
3. Re-enable any auto-updates or auto-backup you turned off
4. Remove your eSIM (after confirming whether it can be reused; see your plan's details)

Deleting an eSIM profile sometimes prevents you from reinstalling it later. Before deleting, check your plan's details and our frequently asked questions to be sure.

Using Bloomy eSIM: the full workflow

With Bloomy, activating your eSIM is as simple as tapping a setup link. Completing setup over Wi-Fi before you leave means you can activate your eSIM immediately upon arrival without rushing at the airport. Detailed setup steps are in our setup guide.

1. Before departure (over Wi-Fi): Tap the setup link to add your eSIM.
2. Right before departure: Disable your home-country line using the steps above. Also turn off auto-updates and auto-backup, and set your eSIM as your mobile data line.
3. Upon arrival: Disable Airplane Mode and activate your eSIM's line; confirm you have a connection.
4. No connection?: Try toggling Airplane Mode on and off, restarting your device, and re-confirming your line selection.

Activation timing varies by plan, so check your purchase confirmation as well.

Ready to find a plan for your destination? Visit our eSIM plan comparison to filter by country, data allowance, and duration. Pricing and coverage change periodically, so confirm the latest details before purchase. Not sure how much data you need? Think about whether you'll mainly use maps and messages or also stream video and do video calls. For pre-purchase questions, check our frequently asked questions. To read related setup articles all in one place, visit our eSIM guide section.

Related articles: My Primary Line Got Charged—Dual SIM Settings to Review / Switching Back to Your Home-Country Line After Returning—Plus Troubleshooting

Summary

If you don't plan to use your home-country number during your stay, disabling your home-country line entirely is the clearest and safest approach. If you do need to receive calls or SMS, keep your line active but disable roaming, and confirm the charges beforehand with your carrier. Once your settings are in place, if you still see unexpected charges, start with the troubleshooting steps. Good luck with your trip!

※ Setting names and positions vary by device and OS version. Carrier charges and conditions may change. Check your carrier's official information and the most current details on our site before you go.