I'm facing a strange problem.
With my Xperia Z Ultra, when I insert a virgin mobile France SIM card, the phone goes in an infinite reboot loop... Can't do anything. It's the second SIM card from this carrier that does it.
With a T-Mobile US SIM card, it doesn't do it. But of course, I can't and don't want to use the T-Mobile SIM card in France.
Any thoughts? Our do I have a faulty unit and need to send it back to Hong Kong?
Thanks for your help
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