How to install an eSIM on iPhone in 60 seconds
May 1, 2026 · Skybyte Team
If you have ever set up an iPhone, you can install a Skybyte eSIM. The whole process takes about a minute and you do not need to remove the SIM tray, find a paperclip, or visit a carrier store. This guide walks through every tap, what each screen actually means, and what to do when iOS gets confused.
Before you start: the 30-second checklist
Three things have to be true for an eSIM install to work. Confirm them before you scan anything.
- Your iPhone supports eSIM. Every iPhone XS and later supports eSIM. iPhones 14 and 15 sold in the United States are eSIM-only — they have no physical SIM tray at all. If you are unsure, open Settings → General → About and scroll to "Available SIM". If it lists an EID number, you are good. If you bought your phone secondhand or from a carrier, see is your phone eSIM compatible for the full matrix.
- Your iPhone is not carrier locked. Most US carriers unlock phones after 60 days of paid service. Locked phones can sometimes still install a travel eSIM but will refuse to make it the active line. Settings → General → About → Carrier Lock should say "No SIM restrictions".
- You are on Wi-Fi. Yes, you can install an eSIM over cellular, but the QR scanner is jittery on a moving cellular connection and a fresh install over LTE will sometimes fail at the activation step.
The four-step install
After checkout, Skybyte sends you an email with a QR code and a 1‑click "Install on this iPhone" button. Either path works.
Step 1 — Open Settings → Cellular → Add eSIM. On iOS 17 and later, you'll see two options: "Transfer From Nearby iPhone" and "Use QR Code". Tap Use QR Code.
Step 2 — Scan the QR or paste the activation code. Hold the QR from your laptop or another phone in front of your iPhone camera. If you are installing on the same iPhone you received the email on, tap the "Enter Details Manually" link and paste the SM-DP+ address and activation code from the email. Both are in the install card we send.
Step 3 — Confirm and label. iOS asks you to label the line. Pick something obvious like "Japan trip" or just "Travel". This label is what you'll tap to switch lines later, so make it readable at a glance.
Step 4 — Choose a default line. This is the screen most people get wrong.
- Default line for cellular data: set this to your Skybyte eSIM. This is the connection that will use mobile data while you travel.
- Default line for iMessage and FaceTime: keep it on your home line. Otherwise iMessage will tie itself to the travel eSIM and stop working when you remove it after the trip.
- Default line for calls: keep it on your home line unless your travel eSIM includes voice (most data eSIMs do not).
Tap Done. iOS provisions the line in about 10 seconds. You'll see the line appear in Settings → Cellular with a green dot when it's active.
Turn on data roaming on the right line
This is the single most common reason a freshly installed eSIM shows "No Service" or "1x" in the corner.
Settings → Cellular → tap the travel eSIM line → enable Data Roaming. Even though your eSIM is a local plan in your destination country, iOS still treats it as roaming for the line and won't fetch data without this toggle.
:::callout{type=tip} Travel eSIMs are technically "local" plans, but iOS doesn't know that — it sees a foreign SIM and defaults to roaming-off. Always enable Data Roaming on the travel line specifically, not your home line. :::
Pick the right plan for your trip
If you haven't bought a plan yet, the right amount of data depends on how you actually use your phone abroad. Most travellers underbuy. Maps, ride apps, and casual social media for one person on a 7-day trip is usually 3–5 GB.
Troubleshooting the four most common errors
"This code is no longer valid." The activation code can only be installed once. If you uninstall and try to reinstall, you'll see this message. Email support and we'll re-issue.
"Cellular Plan Cannot Be Added." Your iPhone is carrier locked. Contact your home carrier to unlock — most US carriers do it free after 60 days.
Line shows "No Service" with full bars on the other line. Data Roaming is off on the travel eSIM line. See the section above.
"Activation in Progress" stuck for over a minute. Toggle Airplane Mode on, wait 5 seconds, toggle off. If it's still stuck, reboot. iOS sometimes needs a full restart after a fresh eSIM install.
After your trip
You don't have to delete the eSIM when you get home. iOS lets you keep up to 8 eSIMs stored on the phone and toggle each one on or off. If you travel back to the same country and your plan is still valid, just re-enable the line.
If you do want to remove it: Settings → Cellular → tap the line → Remove eSIM. The line is gone permanently — you cannot reinstall the same activation code.
Headed to a specific country?
If your phone is Android, see our Android eSIM install guide. If you're not sure your phone supports eSIM at all, run the compatibility checker — it takes about 5 seconds.