If you prefer eink but want the size of a phone, there are some good, cheap phone sized android eink readers now. You have to hack them a bit to get English instead of Chinese, or buy from a seller on aliexpress who already did it for you, but it's not a problem. I use a moaan inkpalm and I couldn't be happier. I find myself reading in the odd moments I have here and there, which is not something I managed to do with my kindle.