Talk:United Kingdom/@comment-193.66.202.18-20190812062957/@comment-24682153-20190813111240

This is very likely that every "unlimited" or larger pack is capped at 15 GB for roaming in the EU and this cap re-starts with every new purchase. So the £20 EE Data Pack gives you 10 GB as advertised. This is after all €2.16 per GB which is still a good rate, but not exceptional as the regulated EU FUP is set at around €2.70 per GB in 2019. Some people complained about EE's roaming partners abroad: in Germany for instance EE steers heavily to o2 that has a clearly weaker network than Deutsche Telekom which was their previous partner.

For big roaming data amounts IMO Voxi by Vodafone has the best offer with 45 GB at £20, that's considerably less than EE. You can use all of the 45 GB abroad mostly on Vodafone or partner networks. With them you end up paying less than €0.50 per GB instead of more than €2 with EE. But it's your choice.