I've got a Raspberry Pi 3 model B which runs Raspbian Jessie. I'd like to host an SSH or telnet server on it that my phone can connect to, even when the Pi is not connected to Wi-Fi or cellular.
I was going to use hostapd or similar to host a hotspot, then connect to that with my Android phone — problem is, the Pi's internal wireless chip doesn't seem to support master mode, which eliminates any chance of being able to use hostapd — there is absolutely no space for an extra wireless adapter in my project box, even the tiny coin-sized ones without an antenna.
Is it possible to host a Wi-Fi hotspot from my Pi 3's internal wireless card, or some kind of other solution that would allow me to host a constant telnet/SSH remote command shell for my Android to connect to — even when the Pi is on the road without a WiFi source?
P.S.: My phone does not have Wi-Fi hotspot functionality, so that's also out of the question.