I’m in Australia

[Beth_123]

Hello, 

I am In Australia and I was wondering how much a month it would be to use 4g here 

[Enlli]

Put Australia in the search box on this page and it will give you the prices.

Unless you are an Ultimate customer a month could work out expensive

https://www.o2.co.uk/international/using-your-phone-abroad

[jonsie]

All you need to know in this link

Guide: Roaming MegaGuide 

It will depend on your tariff as to whether you have Travel Inclusive or have Volt benefits

Volt Megaguide