iPhone 15 eSIM No Service? 8 Proven Steps That Fix It

A "No Service" indicator on iPhone 15 after installing an eSIM is frustrating, especially if you have just landed somewhere new and need data right away. The good news: in our experience, more than 90% of these cases come down to one of eight specific problems. This guide goes through them in order, from the quickest fix to the deepest reset.

If you bought your plan from us and want help while you troubleshoot, contact eSIMSupra support — we are available 24/7.

Quick Diagnostic Checklist

Before going through individual fixes, confirm:

• iOS version is 17.0 or later (Settings → General → Software Update)
• The eSIM profile shows up in Settings → Cellular as a line
• You are inside the destination country (or arriving within 1 hour)
• The phone is not carrier-locked (Settings → General → About → Carrier Lock should say "No SIM restrictions")

If any of those is wrong, address it before the steps below.

Step 1: Enable Data Roaming on the eSIM Line

Travel eSIMs technically operate as roaming connections — even when they are your primary data line. iOS blocks roaming connections by default unless you explicitly allow them per line.

1. Open Settings → Cellular.
2. Tap your eSIMSupra line.
3. Toggle Data Roaming to ON.

Wait 10–20 seconds for the line to register. If you still see "No Service," continue.

Common mistake: People enable Data Roaming on their home carrier line instead of the eSIM line. Each line has its own toggle on iPhone 15.

Step 2: Set the eSIM as Cellular Data

iPhone 15 supports two active SIMs at once. The phone needs to know which line carries mobile data.

1. Settings → Cellular → Cellular Data.
2. Pick the eSIMSupra line.
3. Optionally enable Cellular Data Switching so iOS can fall back to your home line if the eSIM has no signal.

If your home line stays selected as Cellular Data while traveling, the phone will keep trying to use it (with no signal abroad), and the eSIM will sit idle.

Step 3: Toggle Airplane Mode

The simplest reset for stuck radios:

1. Swipe down from the top-right corner of the screen.
2. Tap the airplane icon (turns orange).
3. Wait 30 seconds.
4. Tap the airplane icon again to turn off.

Within 10–20 seconds, the eSIM should re-register and pick a network. If not, move on.

Step 4: Manually Select a Network

Travel eSIMs route through specific local carriers. If iOS auto-selects a carrier without a roaming agreement, you will see "No Service" even though Data Roaming is on.

1. Settings → Cellular → [eSIM line] → Network Selection.
2. Toggle Automatic to OFF.
3. Wait 30–60 seconds while the phone scans.
4. Pick a carrier from the list. Match it against the network listed on the country page for your destination (browse destinations to see which local networks each plan uses).

If the list is empty or your eSIM provider's partner network is not shown, the eSIM may not have a roaming agreement in your specific area. Try a different city or check our coverage list.

Step 5: Restart the Phone

Sometimes the radio firmware just needs a clean restart:

1. Press and hold the side button + either volume button until the slider appears.
2. Slide to power off.
3. Wait 10 seconds.
4. Press the side button to restart.

After boot, give the eSIM 30 seconds to register before checking signal.

Step 6: Check Cellular Data Plans Settings

Some plans need extra activation steps that are easy to miss:

1. Settings → Cellular.
2. Tap your eSIMSupra line.
3. Verify these are correct:

- Turn On This Line is ON

- Cellular Data is set to this line (or it is the active data line via Step 2)

- Voice & Data shows 5G or LTE (not 3G — some carriers have shut down 3G entirely)

- Network Selection has either Automatic ON or a manually-chosen valid carrier

If any of these is off or wrong, fix and wait 20 seconds.

Step 7: Reset Network Settings

This is more aggressive. It erases saved Wi-Fi passwords, paired Bluetooth devices, and VPN profiles, but keeps your apps and data.

1. Settings → General → Transfer or Reset iPhone.
2. Tap Reset → Reset Network Settings.
3. Enter your passcode.
4. Phone restarts.
5. Reconnect to Wi-Fi, then re-enable Data Roaming on the eSIM line (Step 1) since the reset disabled it.

This fixes corrupted network preferences that caused the "No Service" state.

Step 8: Re-Install the eSIM Profile

If the profile installed but failed to provision properly (rare), remove and re-add it:

1. Settings → Cellular → [eSIM line] → Remove eSIM → confirm.
2. Connect to Wi-Fi.
3. Open your eSIMSupra activation email.
4. Re-scan the QR code, or use the manual installation details (SM-DP+ Address and Activation Code).

Your QR code is valid for 180 days from purchase. If you cannot find the activation email, contact support and we will resend it.

Common iPhone 15 Behaviors That Look Like "No Service"

Some symptoms look like outages but are actually expected:

When to Contact Support

If you have completed all 8 steps and still see "No Service":

• The eSIM may not have provisioned yet (allow 10–15 minutes after purchase)
• The local network may have a regional outage
• The supplier may need to re-issue the profile

Reach our 24/7 support — we can check the supplier-side activation log and diagnose the exact cause within minutes.

Frequently Asked Questions

Why does my iPhone 15 show "No Service" right after I land?

The phone needs 30 seconds to a few minutes to scan local towers and register on a network. Most plans labeled "First Network Connection" only start working once you arrive in the destination country, so the eSIM was idle until landing. Give it time and toggle Airplane Mode if it stays stuck past 5 minutes.

Do I need to be physically in the country before the eSIM works?

For travel eSIMs that say "First Network Connection" billing, yes — the validity timer and connection only start once you connect to a tower in the destination country. You can install the QR code at home before travel without using any data. See the installation guide for setup steps.

Can I leave Data Roaming on permanently?

On your eSIMSupra line, yes — your plan is prepaid, so leaving Data Roaming on does not cost anything extra. But you should keep Data Roaming off on your home carrier line to avoid surprise charges from your home provider when traveling.

My eSIM works on my old iPhone 14 but not iPhone 15. Why?

iPhone 15 (US version) is eSIM-only and has stricter carrier-lock checks. If the iPhone 15 was financed through a US carrier and not yet paid off, it may be locked. Check Settings → General → About → Carrier Lock. Outside the US, iPhone 15 supports both physical SIM and eSIM.

Will resetting Network Settings delete my photos or apps?

No — Reset Network Settings only clears Wi-Fi passwords, Bluetooth pairings, and VPN configurations. Photos, apps, contacts, and accounts stay intact.

Still Not Working?

If you have tried all 8 steps, reach out to our support team with your order number. We can check the activation status with the supplier and either fix it remotely or issue a replacement eSIM.

For your next trip, consider running the numbers with our roaming savings calculator — it shows exactly how eSIMSupra rates compare against your home carrier's roaming fees for the destinations you visit most.