Good Morning @Funmious.
Welcome to the community.
Do you mean is it free to call 0800 numbers whilst roaming in the USA?
Or, @Funmious, do you mean is it free to call US Toll-Free 800 nos. whilst roaming in the USA? I doubt it as that is not a normal US mobile or landline no.
Which? UK 0800 or US 800?
One of these options may help you find the answers you need.
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