So as we know, we are able to take our phones to the EU and a couple of other places and use pretty much our inclusive allowance. You can use 15GB data in a rolling monthly allowance, but other than that, Mins and SMS are just subject to fair usage.
Now with the new O2 Travel Inclusive Tariff from O2, The list of Countries got much bigger where you can use your phone for free. There are 48 EU/EEA Country and 27 O2 Travel Inclusive Countries making it a total of 75 Countries.
However this is where the but is. In countries other than EU countries, The New 27 Roaming Countries you can only use 120 Mins and 120 SMS per day and 150MB data per day (Speed Restrictions apply)
I have created a table with all the countries that you can use the phone in
The ones in Green you can use your own allowance. (15GB Max Data per your monthly allowance if you have that much, Or less if you have less)
The ones in Blue, you get your Daily Allowance and anything over the allowance you will be charged you normal standard roaming rates. (120 Mins and 120 SMS per day and 150MB data per day (Speed Restrictions apply))
If you do have O2 Travel Inclusive on your Tariff, you can also use your phone in additional 33 Countries for £4.99 per day and get a separate allowance to use which is 120 Mins, 120 SMS and 150MB Data (Speed Restricted)
Countries that are charged at £4.99 per day, are charged in local capital time of the country you are visiting.
So in total you can use your phone in 75 Countries for free 33 at £4.99 per day, meaning that o2 Contract O2 Travel Inclusive have a total of 108 countries to use in (33 are chargeable)
Also please note that 5 Countries you can obtain 4G Roaming, These are Germany, Spain, Czech Republic, Isle of Man and Australia.
Rest of the countries you will either get a 3G or 2G signal depending on the country, network and location you are visiting.
****** NOTE ******
O2 Travel Inclusive Roaming is only available on selected eligible O2 Refresh tariffs, as well as sim only tariffs higher than 20GB (20GB excluded).
Both the O2 Travel bolt on and the Inclusive Zone bolt on need to be active to benefit from these allowances.
More info can be found here https://www.o2.co.uk/international/travel-inclusive-zone