Hi live in the USA. We have an iPhone 6 and a Galaxy S5 and we both have WhatsUp installed. I will be going to the UK for business and will be getting a UK SIM card from Three Co.
How will WhatsUP work with a USA mobile # and a USA mobile phone with a UK SIM?
That's not a problem. However you can only use one sim card at once
Thanks Dave can you elaborate? I already have the UK SIM. I put the UK SIM in the S5 to test. Since I have a Three Co SIM Feel at Home I'm able to get data.
When I called from the S5 via WhatsUp with the U.K. SIM it worked. But it was showing US contact with US phone#. Just don't want to incur any charges from AT&T.
— modified on Dec 21, 2015, 10:34:01 AM