Hi @Duncamodo, and welcome to the forum I've reached out to find out more about the error you're reporting, and as soon as we have more information we'll share it with you!
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I made sure to use the IMEI number from the settings menu in my p20 pro and it went through fine 1st time with me. I also made sure the order number had the 'ms- ' (i just copied and pasted it from the order confirmation tbh). Maybe that is something to try if you haven't already?
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