Mine worked fine last weekend. Turned it on today to find it blocked. Not been dropped (just been sitting on worktop all week). Wasted ages messaging robots through Sumup Support. Finally spoke to a human to be told its several years old - buy a new one! When I objected & said it hadn't been dropped or even used since last week, I was told it had probably been plugged in too long or subject to extreme temperatures 🤯
I have now replaced it WITH A ZETTLE.
I'm convinced Sumup stop them working from their end to make you replace the reader. Won't be buying another from them!