Troubleshooting
Why is my eSIM not working?
By Serhat Dogan · Founder & editor, Miyaw eSIM · Last updated 2026-06-07
If your travel eSIM is installed but has no internet, the most common cause is that Data Roaming is switched off. A travel eSIM connects by roaming onto local partner networks, so Data Roaming must be ON for that line. Turn it on first — it fixes most cases in seconds. If it doesn't, work through the symptom checklist below.
Find your problem fast
Match what your phone shows to the most likely cause, then jump to the fix. Most "my eSIM isn't working" reports are one of these six.
| What you see | Most likely cause | What to do |
|---|---|---|
| Installed, but "No Service" / "SOS only" | Data Roaming is off (most common) | Turn Data Roaming ON for the Miyaw line |
| Signal bars, but pages won't load | Wrong data line, or APN issue | Set Miyaw as the data line; APN is automatic except in Japan |
| Stuck on "Activating" | Carrier server still preparing the profile | Wait 2–3 min on Wi-Fi, toggle Airplane mode, restart — don't delete it |
| "No SIM" / the line is missing | Line toggled off, or profile didn't finish | Settings → Cellular → turn the Miyaw line on |
| Data "used up" too fast / usage looks wrong | Usage is reported on a delay, not real-time | Wait a few hours; check the plan's data cap and fair-use limit |
| iMessage / FaceTime stopped after switching | Apps re-register to the active line | Re-enable iMessage/FaceTime over Wi-Fi after the eSIM connects |
Fix it by device (iPhone & Android)
The two settings that fix most cases are "turn the line on" and "Data Roaming on" — both are set per line. Android menu names vary by brand; the paths below are verified on iPhone and recent Pixel/Samsung.
| Step | iPhone (iOS) | Android |
|---|---|---|
| 1. Turn the eSIM line on | Settings → Cellular → [Miyaw line] → Turn On This Line | Settings → Network & internet → SIMs → [eSIM] → turn on |
| 2. Turn ON Data Roaming (Miyaw line) | Settings → Cellular → [Miyaw line] → Cellular Data Options → Data Roaming → On | Settings → Network & internet → SIMs → [eSIM] → Roaming → On (Samsung: SIM manager → Mobile networks) |
| 3. Set Miyaw as the data line | Settings → Cellular → Cellular Data → [Miyaw line] | Settings → SIMs → Mobile data → [eSIM] |
| 4. APN (only if still no data) | Auto on almost all plans. Japan only: Settings → Cellular → Cellular Data Network → APN vmobile.jp (Docomo) or plus.4g (SoftBank) | Auto on most plans. Japan only: APNs → vmobile.jp / plus.4g |
| 5. Re-search the network | Toggle Airplane mode; restart; Network Selection → Automatic | Toggle Airplane mode; restart; Mobile network → choose automatically |
Don't delete the eSIM while troubleshooting — each Miyaw QR code installs once, so removing the profile can mean you cannot reinstall it without contacting support.
Start here: turn on Data Roaming
"Roaming" sounds like a surprise charge, but a travel eSIM is different: it is prepaid local data, and "roaming" is simply how it connects to the local partner network in your destination. There are no extra fees — but if Data Roaming is off for the eSIM line, you get no internet even though the eSIM shows as installed and active. This is the number-one cause of "my eSIM isn't working."
On a dual-SIM phone, set it per line: Data Roaming ON for the Miyaw line, and OFF for your home number so it never connects abroad. Then make sure the Miyaw eSIM is selected as the line for cellular data.
Bars but still no internet? Check the data line and APN
Signal bars only mean the phone reached a network — data also needs the right line selected and a valid APN. First confirm Data Roaming is ON for Miyaw and that Miyaw is your cellular-data line. If pages still won't load, the APN may be the issue.
On almost every Miyaw plan the APN is configured automatically — you don't touch it. The one documented exception is Japan, where you may set it manually: vmobile.jp on Docomo (total-data plans) or plus.4g on SoftBank (daily plans). Some Android models also need a manual APN; it varies by device.
Stuck on "Activating" (and what iOS 26 changed)
"Activating" means your phone has the eSIM but the carrier's server is still finishing the profile. It usually clears within a few minutes on a stable Wi-Fi connection. If it doesn't: stay on Wi-Fi and wait 2–3 minutes without leaving the Settings screen, toggle Airplane mode on and off, then restart the phone and try a different Wi-Fi network.
On iOS 26, install and activation are separate steps — a travel eSIM you add at home can stay on "Activating" until you land and the phone connects to the destination network. That is expected for many plans. Whatever you do, don't delete the profile to "start over": each QR code installs once.
"No SIM" or "No Service"
With an eSIM, "No SIM" usually means the line is switched off or still installing; "No Service" means the line exists but can't find a network — often because Data Roaming is off, or you're outside the plan's coverage area. Confirm the Miyaw line is listed and turned on, Data Roaming is on, and you're inside a country your plan covers.
It says I've already used all my data
Usage on travel eSIMs is reported on a delay — the network sends batched snapshots every few hours, not in real time. So a counter can briefly look wrong or lag behind. Give it a few hours before assuming a plan is exhausted, and check whether you've hit the plan's data cap. On "unlimited" plans, hitting the daily fair-use cap throttles your speed (it doesn't cut you off) — messaging and maps still work, video gets slow.
When to contact support
If you've turned the line on, enabled Data Roaming, confirmed coverage and waited out activation and it still won't connect, it may be a technical issue on our side or the network's. Email hello@miyaw.io with your order details and the exact message on screen — don't delete the eSIM first, since that can block reinstallation.
eSIM not working — quick answers
- Do I need to turn on Data Roaming for an eSIM?
- Yes — for the eSIM line. A travel eSIM connects by roaming onto local partner networks, so Data Roaming must be ON for the Miyaw line (and you can leave it OFF for your home number). There are no extra roaming fees; the data is prepaid.
- Why is my eSIM stuck on "Activating"?
- The carrier server is still finishing the profile. Stay on Wi-Fi and wait 2–3 minutes, toggle Airplane mode, then restart. On iOS 26 it may stay on "Activating" until you reach your destination. Don't delete the eSIM — each QR code installs once.
- Why does my eSIM say "No Service"?
- Usually the line is off, Data Roaming is off, or you're outside the plan's coverage. Check that the Miyaw line is on, Data Roaming is ON for it, and you're in a covered country.
- I have signal bars but no internet — what's wrong?
- Bars mean the radio connected, but data still needs Data Roaming on, Miyaw set as the data line, and a valid APN. APN is automatic on almost all plans; the exception is Japan (vmobile.jp / plus.4g).