On iOS 18.4 and later versions, if there's a problem with your data connectivity, you may see the "PDP Session Failure" error on your device.
What is PDP Session Failure error?
In simple terms, a PDP Session Failure error is your device's way of indicating that it can't shake hands properly with the network to start using mobile data.
You may have strong network signal on your device, meaning coverage is good
You may even see 4G/5G icons on your device's network bar, meaning
But your data does not work
How to Solve PDP Session Failure?
Resetting your network connection and connecting back to the network often resolves the PDP Session Failure error.
Please do the following, in the order given, and after each step, please test to see if your connectivity is restored.
1. Turn ON Airplane Mode > Wait for 10 seconds > Turn OFF Airplane Mode
Turning airplane on/off drops and re-establishes your network connection
While it is very a simple method, it is effective in troubleshooting basic network-side issues and will often get you back online
2. Turn OFF Roamless eSIM > Wait for 10 seconds > Turn ON Roamless eSIM
The logic is similar to airplane mode on/off, but turning your eSIM off and back on is a more comprehensive method of resetting your network-side connectivity
So if airplane mode on/off step does not work, make sure to try this next
After you turn your eSIM back on, remember to select it for cellular data again. Device settings may have changed when you turn off your eSIM
3. Reset your APN Settings
APN settings are critical to how your device connects to the internet
If you have good network signal, but are not seeing 4G/LTE/5G on your network bar, this may indicate a problem with your APN settings
Resetting the APN settings is a simple but effective way to reset certain things on the network-side as well
4. Delete and Re-install your Roamless eSIM
Make sure you have a strong WiFi connection before you delete your eSIM
"Airplane mode on/off" and "turning your eSIM off/on" are good tricks to reset network-side connectivity
Deleting your eSIM from your device and re-installing it will not only reset network-side connectivity, it will also reset a few things on the device-side that may sometimes cause data connectivity problems
Deleting your Roamless eSIM has no impact on your credits, rewards or data plans. Your account balance is safe.
You can delete and re-install the Roamless eSIM as many times as you need
If none of the above steps work, and you are still getting "PDP Session Failure" error, please reach out to the Support Team so that we can check network-side logs and assist you in person.