So for the past couple of days my cell phone has been fairly regularly crashing when I receive a call. Not the whole phone, just the bit of software that lets me answer phone calls. It doesn't happen all the time, but three times out of four. (Two of those three times, I'll hear the ring but won't be able to answer. The third time, there won't even be a ring, just an error message on the screen the next time I take it out of my pocket.) Usually, I can’t tell who is calling so I can’t call them back.
I'm going to reinstall the phone OS the next chance I get, but in the meantime, text messages (or email) are a better way to get in touch with me.