ask for SIM-PIN(s) on boot (on lock screen, before unlocking)
As the battery drains quickly the phone consequently tends to require restarting more often.
And because the phone currently boots to the lockscreen and then suspends, it's easy to forget that logging-in is required just to unlock the SIM card for mobile connectivity. And thus the phone can easily remain non-functional.
Idealy, the PIN dialog could be (safely?) shown on top of the lock screen, instead of only after logging in, and for some time insert some /sys/power/wake_lock (#237), to prevent suspending after the screen-off timeout and repeat to schedule wake events to play some informational noise like every minute.