I'm on my second day with my Umi Plus E, and I've found the same problem. The stuck/dead pixel is green and appears since the boot screen. It's a shame, and I'll ask for a refund.
Kadavro replied at 2017-4-3 00:25
I'm on my second day with my Umi Plus E, and I've found the same problem. The stuck/dead pixel is gr ...
We always recommending to contact to seller for warranty. Be honesty to you there is not to many devices which such issues so maybe you will be happy with replacement product.