Onyx has released a new phone-sized E Ink device called the Palma. They did a test run a while back but it was only available for less than one day before it sold out, and now the official version has been released. So far the Boox Palma is only available to order directly from Onyx's
Onyx BOOX Palma is a phone-sized eReader with a 6.13 inch E Ink display - Liliputing
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BOOX really delivered with the Palma. It's an amazing device. : r/Onyx_Boox
Onyx BOOX Palma review - Looks like a phone but it's a mini ereader that fits in your pocket - The Gadgeteer