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I have just noticed a strange pixelation next to my finger print scanner, I haven't dropped the phone so I'm wondering where this has come from?
Hi @Mrhurstgj,
I'm sorry to hear this.
Could you provide us with a picture of this? It would be very helpful to determining if this is hardware related or not.
Screenshowith no bad pixels
Bad pixels near thumb scanned
I'm afraid that looks to be hardware related. 
I recommend that you get in contact with your Local support team for assistance with how to have your device sent in to an authorized service center for repair.
Let me know if there is anything else you are wondering about.