I've running the Yotaphone 2 lately and it works great. The brighter it is the better it is. The only issue is since there is no color, some of the icons are difficult to decipher. I picked mine up for $110 but they are getting harder to find now. Word is they are coming out with the Yotaphone 3 model this month with a bigger screen but since it is a new phone will go for $600.