03-12-2018 23:20 - edited 03-12-2018 23:23
Yes you can
You need the O2 Travel Bolt on
All info here. https://www.o2.co.uk/shop/international/using-phone-abroad
O2 Travel is available on Pay Monthly. 120 minutes, 120 texts and data for £4.99 a day.
If you've got a Pay Monthly sim, text O2TRAVELto 23336.
on 03-12-2018 23:21
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)
on 03-12-2018 23:24
Although there are complaints about data speeds using O2 in NYC.