Originally Posted by steffangl:
“This is the most pooly understood and falsely documented setting I've ever seen on iOS.
The toggle does NOT enable or disable access to the internet in the EU.
It is used to change the access point (APN) from your networks one to a generic EU one, so that you can be charged for roaming by an alternative roaming partner (ARP). You sign up to an ARP instead of roaming as usual and being billed by your own network.
When enabled, the 'everywhere' APN on EE, or 'idata.o2.co.uk' on O2, will change to 'euinternet' when in the EU.
AFAIK there aren't yet any companies you can sign up to for this service so it's pretty much a redundant setting.”
Strictly speaking steffangl, some of that isn't entirely correct either. The euinternet APN is for use with a local break out provider not an alternative roaming provider (where you need to keep your usual data settings).
For anyone not aware of the new options the EU brought in last year they are:
1.
Alternative Roaming Provider
The ARP option lets you sign up with another provider who will bill you for all your roaming usage like calls, texts and data. They need to have an agreement with your home provider and you would normally sign up with them before travelling. Usage records are passed to the ARP who bill you. You aren't billed for any roaming usage by your home provider. To use this requires no change to your data settings as your billing status is all sorted out between your home provider and the ARP after signing up.
2.
Local Break Out
The LBO option allows you to be billed for data by the foreign network (or someone linked with them) you are roaming on most likely on a prepaid basis. You'll still be billed for voice and texts by your home network but data will be handled by the LBO provider. This is enabled by changing your APN data settings to euinternet. The iOS option just gives you an easy way to do this (and change it back when you get home) but it has been the cause of a number of 'no data' support calls as most people seem to assume it should be on when in the EU.
I'm not sure if any ARPs actually exist in practice as it requires some level of investment by the ARP and it came in when all the talk was of an end to roaming charges by the end of this year.
However LBO providers do exist so the euinternet setting is something that can be used. Here's an example if you roam on Bite in Lithuania.
https://www.cheapdata.com