eSIM not working in Switzerland
Your Drift Europa eSIM has no data in Switzerland? Here is the real fix, step by step, iPhone and Android, with Switzerland operator APN reference.
Networks in Switzerland
Switzerland has 3 major operators, all compatible with travel eSIMs:
| Operator | Coverage | Technology |
|---|---|---|
| Swisscom | 1er réseau, meilleure couverture Alpes | 4G/5G |
| Sunrise | 2e réseau (fusionné UPC) | 4G/5G |
| Salt | 3e réseau, urbain principalement | 4G/5G |
Your eSIM connects to one of these networks (most often Swisscom). 4G coverage spans the large majority of tourist and urban areas.
Diagnosis in 5 steps (in this order)
Work through these before anything else. Nine times out of ten, the fix is in this list.
Steps 2 and 3 fix the large majority of cases. Data roaming is required for any travel eSIM. It does not add charges on a Drift Europa plan.
Airplane mode as a diagnostic tool
Toggling airplane mode forces the phone to detach from the network and search fresh. It is faster than a full restart and clears most handover issues (when the phone stays attached to a ghost signal after a long flight). If after the toggle you see the operator name on screen but still have no data, the issue is almost certainly roaming (step 2) or data line (step 3).
Signal bars vs. data
A common trap: you see signal bars but nothing loads. Bars mean the phone detects the network, not that it is authorized to exchange data. That is exactly what happens with roaming off: signal is there, but the network refuses your data packets. Turn roaming on and data resumes.
APN in Switzerland: do you need to set it?
No, in 99% of cases. Your travel eSIM sets its own APN automatically via the installed profile.
Do not enter your home operator's APN or a Swisscom APN found online into the eSIM line. Those are APNs for local physical SIMs, not travel eSIMs. Entering one overwrites the profile's APN and breaks your data instead of fixing it.
For reference only (do NOT enter these on your eSIM line):
| Operator | Primary APN | Alt APN | Note |
|---|---|---|---|
| Swisscom | gprs.swisscom.ch | internet | 1er réseau, meilleure couverture Alpes |
| Sunrise | internet | sunrise | 2e réseau (fusionné UPC) |
| Salt | internet | -- | 3e réseau, urbain principalement |
Manual APN entry only if support asks with a specific value. Full procedure: Do I need to set an APN?
Country-specific notes for Switzerland
Swiss Alps
Major valleys, ski resorts, and the main rail corridors (Glacier Express, Bernina Express) are well covered. Very high altitude (above 3,000m) and remote side valleys may have weak signal. Swisscom has the best Alpine coverage.
Trains (SBB)
Swiss trains have good coverage with brief drops in long tunnels (Gotthard, Lotschberg). The eSIM reconnects automatically.
Still not working?
Prepare these three things and contact support:
Support typically identifies the cause in a single exchange.
FAQ
Why does my eSIM have no signal in Switzerland?
Most likely data roaming is not turned on for the eSIM line. Enable it in your mobile data settings. If you see signal bars but no data, also check that the eSIM is set as your data line.
What APN should I use for my eSIM in Switzerland?
None. The eSIM sets its own APN automatically. Do not enter an APN for Swisscom or any other local operator.
Do I need to enable roaming to use my eSIM in Switzerland?
Yes, it is required. Data roaming must be ON for the eSIM line. There is no extra charge. Roaming is already included in your plan.
My eSIM worked yesterday in Switzerland but not today. What do I do?
Check that your plan is not expired or used up. If it is still valid, toggle airplane mode (10 seconds on, then off). If that does not help, force network selection to Swisscom then switch back to automatic.
Will my eSIM work on the Glacier Express?
Yes. The main Glacier Express route is well covered. Brief drops in tunnels are normal but the eSIM reconnects automatically.