Common eSIM problems and how to fix them fast

Most eSIM issues have a fast, simple fix

Before assuming something's broken, work through these — they resolve the vast majority of connection issues in under a minute.

Problem: no data at all after landing

Almost always data roaming being switched off. iPhone: Settings → Cellular → tap your travel eSIM → turn on Data Roaming. Android: Settings → Connections → Mobile Networks → Data Roaming → enable for the travel eSIM.

Problem: connected but painfully slow

Check which line is set as your Cellular Data line. iPhone: Settings → Cellular → Cellular Data → confirm your travel eSIM is selected, not your home SIM. A common mistake is having data roaming on for the wrong line.

Problem: eSIM shows "No Service"

Toggle Airplane Mode on for 10 seconds, then off. This forces the phone to reconnect to available local networks. If that doesn't work, try manually selecting a network: Settings → Cellular → Network Selection → turn off Automatic → pick a network manually.

Problem: eSIM won't install at all

Double check you have wifi or existing data when scanning the QR code — installing an eSIM profile requires an internet connection the first time. Also confirm your phone isn't already at its eSIM limit (most phones support multiple eSIMs but can only have a limited number active or installed at once).

Problem: it worked yesterday, not today

A simple restart often resolves this — it clears connection states that toggling settings alone doesn't always fix.

Still stuck?

Email hello@proost.com.au with your order details. All Proost purchases are covered by Australian Consumer Law — if the eSIM genuinely isn't working as described, you're entitled to a remedy, and we'll sort it directly.