I'm not sure if this is well known but it's just a heads up really as I got caught out. Basically I thought with having free eu phone calls etc included in my EE contract, it would be included in my contract to call and book my holiday accommodation in Portugal, anyhow it appears I've been charged a quid a minute for the pleasure! Anyhow I've found out that there's a free EE add on which once added renews free every month which enables you to call most countries abroad for massively reduced rates, Portugal worked out landlines 5p / minute and mobiles 15p and most are similar... I added it via the EE app but you can call 150 to add it too, I believe it can be added to pay as you go too if anyone has time to enquire?
Anyhow I hope this helps or saves others money as it's a massive reduction if you're calling abroad