14-04-2019 10:59 - edited 14-04-2019 11:00
Turkey is part of Europe but not part of the EU so you would need O2 Travel at a cost of £4.99 per day
Another guide here on Travel to Turkey https://community.o2.co.uk/t5/How-to-Guides/Roaming-in-Turkey-and-Cyprus-On-PAYG/bc-p/1105917
O2 Travel is available on Pay Monthly. 120 minutes, 120 texts and data for £4.99 a day.
To get O2 travel if you've got a Pay Monthly sim, text O2TRAVELto 23336.
Try and use Wifi as much as you can. O2 travel will only charged on the days you use it.
Be aware ONE text will generate the £4.99 charge
Best of luck, Enjoy your holiday and welcome to the forum