Initial setup becomes unresponsive to input
I'm not sure if this is an issue with phosh, the on-screen keyboard, or something else.
During initial phone setup, the phone repeatedly became unresponsive to input. It would either lag somewhat before registering a touch, or stop registering touches entirely, or stop updating the screen but keep giving tactile feedback on touches.
Initially, I noticed this on the "enter passcode" screen: it didn't respond to touching the numbers at all: the screen didn't update and the tactile feedback didn't happen. I rebooted a couple of times, and eventually it started responding. After unlocking the screen, as I went through the initial setup, I encountered the same problem trying to type in the wifi password; after a few characters, the screen stopped updating, though the tactile feedback continued.
I'd guess that during initial startup there may be many things running in the background; perhaps that's part of the issue?
This had a rather serious impact both on usability and on first impressions.