“Last Line No Longer Available” on iPhone: what it means and how to call anyway abroad

You tap a name in Recents and, instead of ringing, the iPhone stops with this:

Last Line No Longer Available Do you want to call using your remaining line?

Nothing is broken. An iPhone with two lines remembers which line you last used with each contact, and it has just found that line switched off, out of service or removed. On a trip that is usually on purpose: the home line is switched off so it does not roam, while a travel eSIM carries the data. This guide explains what the message means, the six situations that trigger it, what each button does, the fixes in order, and a two-line setup that keeps calls working abroad.

The short answer

• It is about the line, not the contact. The line iPhone last used for that number cannot place the call right now: it is off, has no service, or is no longer on the phone.
• The other line only helps if it can make phone calls. A data-only travel eSIM, like a Horizon plan, has no phone number, so an ordinary call cannot go out on it. Use WhatsApp, FaceTime Audio or another internet call instead.
• To stop it: turn the line back on, choose the line before you dial, set which line that contact uses, or delete the old entry from Recents.
• Abroad, the usual two-line setup: home line on for calls and texts with data roaming off, travel eSIM on for data.

1. What does “Last Line No Longer Available” mean?

iPhone can keep two lines active at once: a physical SIM and an eSIM, or two eSIMs. When you call a contact, it uses the line you used the last time you called them, unless you choose a different one. If you have never called that contact, it uses your default voice line.

When that remembered line cannot carry the call, iPhone stops and asks whether to call using your remaining line. The alert is the phone being careful: it will not move a call to a different number without asking you first.

2. Why does it keep appearing on trips?

Six situations account for nearly all of it:

1. You switched your home line off. Turning a line off in Settings → Cellular keeps it from roaming, and every number you called at home is still tied to that line in Recents.
2. Your home line has no service where you are. Your plan does not include roaming, it has no partner network in that country, or there is no coverage at all. The line shows No Service or SOS, and why a phone shows SOS explains the difference.
3. You removed a line. An eSIM deleted after an earlier trip, or a physical SIM taken out: Recents and contacts still point to it.
4. You picked Travel eSIM Only. With iOS 26 and later, iPhone can ask whether to use the travel eSIM only or both lines, and setup also asks which line to use for calls, messages and data. Travel eSIM Only switches your home line off, so a quick tap can change more than you meant to.
5. The line itself has a problem. A suspended account, an unpaid bill or a carrier outage looks the same from the phone.
6. A software fault. If the alert appears at home with both lines on and full service, an iOS or carrier settings update is the first thing to install.

3. Which button should I tap?

The alert offers two choices:

• Call sends the call through your other line. That is fine when the other line is an ordinary line with a number; the call is billed on that line’s tariff, including its roaming rates if you are abroad. If the other line is a data-only travel eSIM, an ordinary call cannot go out on it.
• Cancel dials nothing. Choose it when you would rather call over the internet, or turn the right line on first.

4. How do I fix it? The steps in order

1. Check the line is on. Settings → Cellular, tap the line, and make sure Turn On This Line is on. If you turned it off on purpose, decide first whether you want calls on it abroad.
2. Choose the line before you dial. On the keypad, enter the number, tap the line shown near the top of the screen, then tap the line you want to use. In Favorites, tap the Info button next to the contact, tap the current line, then tap your other line.
3. Set the line for that contact. Open the contact and choose which of your lines to use with them. The Default Voice Line in Settings → Cellular only applies to contacts you have not called before and to numbers that are not in your contacts.
4. Delete the old entry in Recents. Swipe left on it, tap Delete, then call from the keypad or the contact card.
5. Turn Airplane Mode on and off, then restart the iPhone.
6. Update iOS and carrier settings. Settings → General → Software Update for iOS. A waiting carrier settings update appears as a prompt in Settings → General → About.
7. Reset network settings as a last resort. Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings. It removes saved Wi-Fi networks and VPN settings and can turn data roaming off, so turn Data Roaming back on for the travel eSIM afterwards. Your eSIMs stay installed; deleting them is the separate Delete All eSIMs option, which you should not choose.
8. Ask the carrier of the failing line if the alert appears at home with that line on and showing full bars.

5. How do I call home from abroad without this alert?

Three ways, starting with the one that leaves your home line alone:

1. Internet calls over the travel eSIM. WhatsApp, FaceTime Audio, Viber, Signal and similar apps use the travel eSIM’s data and do not touch your home line.
2. Wi-Fi Calling on your home line. Turn it on at home, in Settings → Cellular under that line, while you still have your carrier’s network to confirm it, and keep the home line switched on during the trip, because it cannot carry calls while the line is off. Abroad it can carry calls on your usual number over Wi-Fi where your carrier supports it; some carriers allow it only at home and some bill it as an international call, so read the tariff alongside the setting.
3. Your home line, switched on. Calls and texts go out on your number and are billed at your carrier’s roaming rates. Keep data roaming off on it so the data still comes from the travel eSIM.

6. What is the best two-line setup for a trip?

A few minutes at home, before you fly, sets up both lines:

1. Install the travel eSIM before you fly, on home Wi-Fi, with the installation guide.
2. Label both lines clearly, for example Home and Travel: in Settings → Cellular, tap each line, then Cellular Plan Label.
3. Keep your home line as the default voice line and make the travel eSIM the line for Cellular Data.
4. Turn data roaming on for the travel eSIM only, and off for the home line.
5. Leave Allow Cellular Data Switching off unless you want the phone to use your home line’s data when the travel line is weak.
6. Decide what the home line does abroad. Leave it on and you stay reachable on your number at your carrier’s rates. Turn it off and your home line does not roam, but calls go over apps, and this alert appears whenever you tap an old entry in Recents.

7. Is it a bug on my iPhone?

Only if it happens when it should not. With one line switched off abroad, the alert is working as designed. If it appears at home, with both lines on and full service, install any iOS and carrier settings update first, then work through the steps above. If it persists, the carrier of that line should check the account and the SIM.

8. Does Android show the same message?

Android phones with two SIMs handle the same situation in their own words: they ask which SIM to use for the call, or use the default set in the SIM settings. The wording depends on the maker, but the fixes are the same: check the SIM is on, set a default SIM for calls, and choose the SIM before dialling.

9. Can a Horizon eSIM make phone calls?

No. Horizon plans are data-only, so there is no phone number on the travel line. Use internet-based apps like WhatsApp, Viber or FaceTime for calls and messages over the data connection. On a compatible dual-SIM phone, you can keep your usual SIM enabled for calls and texts and select the eSIM for mobile data; your home carrier may charge for activity on that line, so check its roaming terms. Internet calling and messaging depend on the app, destination rules and available data service.

If the travel eSIM itself will not install and the iPhone says the code is no longer valid, that alert has its own guide. On eSIM-only iPhones both lines are eSIMs, and how many eSIMs a phone can hold explains the limits.

Short answers

What does “Last Line No Longer Available” mean on iPhone? The line your iPhone last used with that contact is switched off, has no service or has been removed, so it asks whether to call using your remaining line.

Why does it happen when I travel? Usually because the home line is switched off or cannot roam where you are, while the travel eSIM carries data. Old entries in Recents still point to the home line.

What happens if I tap Call? The call goes out on your other line and is billed on that line’s tariff. If that line is a data-only travel eSIM, an ordinary call cannot go out on it at all.

How do I stop it for good? Keep the line you call from switched on, set which line each contact uses, choose the line before you dial, and delete old entries in Recents after a trip.

Can I call a normal phone number with a travel eSIM? Not with a data-only eSIM like Horizon’s. Call through an app over its data, or use your home line.

Is my eSIM broken? No. The alert is about which line a call should use, and it does not affect your travel eSIM’s data.