No Signal vs No Internet — Know the Difference
These are two distinct problems. "No internet" means your device sees the network (signal bars are visible) but can't load data. "No signal" means there are no bars at all — the status shows "No Service" or "Searching." This article covers the no-signal scenario specifically.
Root Causes
Carrier not selected or wrong carrier selected. In a new country, your iPhone or Android may not automatically connect to the right local carrier. The device might try to latch onto your home carrier's roaming partner instead of the one your eSIM is partnered with.
APN is missing or incorrect. Without a valid APN configuration, the device doesn't know how to connect to the carrier's data network — which can appear as a complete lack of service.
eSIM not set as the active data SIM. The profile may be installed but not selected as the data source, making it appear as though there's no connection.
Device doesn't support local frequency bands. Different countries use different LTE bands. Some devices don't support all of them, resulting in no signal in specific regions.
Carrier lock. A locked device cannot register on any network other than its locked carrier.
Step-by-Step Fix
Step 1. Toggle airplane mode for 60 seconds. This resets all cellular connections and forces the device to search for available networks from scratch.
Step 2. Try manual carrier selection.
- iOS: Settings → Cellular → your eSIM plan → Network Selection → Manual → wait for the list → select a local carrier
- Android: Settings → Network → Mobile Network → Network Operators → Search Manually
Step 3. Switch back to automatic carrier selection. After running a manual search, set it back to Automatic — this sometimes locks onto the correct partner network.
Step 4. Check and configure APN manually. Get the correct APN settings from your eSIM provider and enter them manually. Restart after saving.
Step 5. Confirm eSIM is set as the data SIM.
- iOS: Settings → Cellular → Cellular Data → select your eSIM
- Android: Settings → SIM cards → Mobile Data → eSIM
Step 6. Verify coverage in your region. Check with your eSIM provider which exact carriers are supported in your current country — and whether your specific region is covered.
Step 7. Fully restart your device. A complete power-off and restart, not just airplane mode toggle.
Frequently Asked Questions
The eSIM worked fine at home but shows no signal abroad — why? Travel eSIMs connect via partner carriers in specific countries. Verify your destination is supported by your plan, then manually select the partner carrier.
I can see network bars but can't load anything — is that signal or internet? If you have bars, it's an internet problem (APN or roaming settings). If there are no bars at all, use the steps above for a signal issue.
Does travel eSIM work in underground metro systems? That depends on the local carrier's underground coverage — it's not specific to eSIM technology.
If your eSIM consistently can't find a network in your country, the plan may not cover that region. Find a travel eSIM with verified coverage for your destination on Marix.