If your data was working earlier, but you suddenly lost 4G/5G, please see the article: My data stopped working.
If this is the first time you're using your Roamless eSIM, please check the below steps one by one.
Common causes for having signal but no data connectivity
1. Data roaming may be turned off for your Roamless eSIM
As a global eSIM, the Roamless eSIM needs data roaming to be turned ON
Please turn on data roaming for your Roamless eSIM
(This only applies if you are using iOS 18.4 and below, or Android)
2. Roamless eSIM APN settings may be wrong or missing
This is a common case for Android users, where some devices may overrides Roamless eSIM APNs
See Roamless APN settings guide to check and fix APNs
3. Possible "network node" mismatch between device and operator network
Rarely, there can be mismatch between the network mode (4G/LTE/5G) that the device is searching and what the operator provides in your location
You can try changing your Roamless eSIM's network mode from 5G Auto on iOS (or 5G Preferred on Android) to 4G/LTE to see if this restores your data connectivity
iOS: Go to Device Settings > Cellular > SIMs > Roamless eSIM > Voice & Data > select 4G (or LTE) instead of 5G Auto
Android: Go to Settings > Connections (or Network & Internet) > Mobile networks > Network mode (or Preferred network type) > select 4G/LTE instead of 5G Preferred
4. You may be in an area where data connectivity (3G/4G/LTE/5G) is not available on the network operator
There could be different reasons if there's a problem with data connectivity on the network-side (not related to your eSIM or your settings):
Rural areas may sometimes have no data coverage available
Very crowded areas may face network congestion (i.e. the network cannot handle the user load, and your 4G/5G data connection gets dropped)
Certain technical network-side problems may also cause problems with data connections (but these are usually temporary)
See if there are other networks you can connect to in your destination and manually change your network