What’s app phone call charges from abroad

[Jud91]

I'm in Italy and used WhatsApp from my hotel room where I have wifi, to call U.K. which has started a roaming charge.

does anyone know why?

Thanks. 

[PandJ2020]

To start roaming your device has to connect to a cellular service and make a call/text or use some data.

I would advise using flight mode - which can still connect to WiFi.

[Jud91]

Thanks, I hadn't realized as I use WhatsApp for messages.  I assumed WhatsApp calls were the same.

[PandJ2020]

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@Jud91 wrote:

Thanks, I hadn't realized as I use WhatsApp for messages.  I assumed WhatsApp calls were the same.

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WhatsApp messages and calls will use data.  Which if connected to WiFi only won't start roaming.

However, your device has connected to a local cellular service and triggered activation.  (By using flightmode this cannot happen)