Factory Unlocked Phone no International Service?


    Hopefully someone can help. Last two times I traveled overseas I couldn't get my phone to work. I have a factory unlocked iPhone purchased from Apple. I spent a long time on the phone with T mobile support with no resolution. They kept trying to do "over the air updates" which doesn't make sense if my phone was connected to a network then I wouldn't be calling them. Then it devolved into them saying it was an unsupported phone. This was in Canada and the UK, both supported countries. So my question before I take another trip overseas and count on my tmobile phone. How can I get my factory unlocked phone to work with Tmobile's international service?

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