Seems to be an ID Mobile issue as I have the same issue (just seemed to have happened now) and we are in Italy. 

I have the same issue in the Netherlands. Do we just need to wait then?

Have the same issue in Portugal, downloaded eSIM, nothing seems to work? 

I am in Budapest and have the same issue!!  I’m stressing because I need it to access my travel documents whilst travelling around the city 

ID Mobile chat bot not much use either and customer service closed until Monday!

Same issue in Spain 

Hi ​@HermoineGranger, ​@Federica Grilli, ​@TravelingScott, ​@JM24, ​@Helenjayne123 and ​@Davidh400,

We're really sorry to hear you're experiencing this while you're away, and we completely understand how frustrating it must be, especially when you've already tried the usual troubleshooting steps.

A PDP Authentication Error doesn't necessarily indicate a fault with the iD Mobile network itself. It can also occur due to a temporary issue with the roaming network, SIM registration, or the mobile data session between the handset and the network.

As you've already tried a network reset and Airplane Mode, we'd also recommend:

• Manually selecting one of our roaming partners in country that you’re currently roaming in, then switching back to Automatic if it doesn't connect.
• Checking that Data Roaming is enabled on your device.
• Removing and reinserting your SIM (if you're using a physical SIM).
• If possible, testing your SIM in another compatible handset to see whether the issue follows the SIM or remains with the device.

If the issue still persists after trying the above, we'd recommend contacting our Live Chat team so they can run further checks on your line and, if necessary, escalate the issue for further investigation.

We hope you're back up and running as soon as possible so you can enjoy the rest of your holiday.

Regards,

Gemma M

The iD Mobile Social Media Team