My android phone is fully encrypted. It can receive calls while locked, and will time-out (currently set to 60 seconds) during an initiated phone call. So unless it’s snatched within the first minute of an initiated call, the thieves would be locked out.
The EFF recommends using a temporary phone when traveling. On a trip to Europe last year, I took an old, retired smartphone with no SIM card. I did a factory reset before heading out, and then encrypted it. This limited its usefulness to places with wifi, but I could make calls with google voice in a lot of places.
