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Hallo,
bei meinem neuen Xperia X kommt beim starten jedesmal das orange tm Logo, wie bringe ich das weg?
It's probably an Orange mobile, so it came with their software on it, and was probably, a contract phone from them at some point, when the phone was new, around 4 years ago, shortly before they went under.
You could try and flash another firmware on it.
I would suggest looking on xda-developers.com and see what they can help with.