@EchelonDude
You'll need to add credit as you will pay standard rates Using Your Phone Abroad → O2 Travel Search Tool | O2
You will be better off with a local sim or by using WhatsApp over wifi.
USA - Roaming with O2
Due to the need for 4g calling, you won't be able to make calls either.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
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