Those are good questions I can partially answer.
1- I could not find any antenna, sim area on the unit.
2- The software is very locked down. I could not find any way for it to connect to via wireless or otherwise. I also connected it to my lapot via USB and I was not able to do anything with it. This does not mean that it cannot be done but I was not able to. It did not show up as a storage device either.
3- It works without ever having to be connected to anything via any means other than power to charge the battery every now and then. All the sync'ing was done with QR codes. At no point does it need to be connected to anything. In fact you don't even have to create a wallet backup if you do not want to. I did because I am paranoid and wanted a backup.
I could not tell you about the chips as I did not tear it completely apart. The software is so mission specific I did not get anywhere with trying to find out what it was.
I agree with the other person who posted that the company needs to at least give some more info on it's internals and OS. It seems that the OS is single purpose driven to the point it does this one thing only. I could find no other options or things in it so far.
As for my review being PR positive it was because I am happy with it so far and did not find any real negatives to turn me off to it yet. That may change if something comes up and I will update you all immediately if it does.
This was not an item from the company to me to review either.
I purchased this because I wanted to try a solution now and not much else was shipping that I could get my hands on. The Trezor is out but they are only fulfilling pre-orders so far. BFL rarely ships anything. The Pitbull did not get funding enough to produce any yet. That left me with the Hardbit to try.
As soon as I can get a Trezor I am going to do a comparison. I hope to know more about the Hardbit by then as well as I have sent an email asking about some of the very things you asked about.
Also thanks for your input I will remember these things so I can make my reviews better.
ok the OP made maybe 3 small points, but can someone do a proper review, you know on that contains details, actual details.
EG
1. is it a re-coded phone that still has all the antenna and phone chips inside
2. has the android software had all phone related code removed, to ensre it cannot communicate wirelessly with a simple 'enable' button.
3. is it so secure that it never requires connecting to a PC, for any updates, syncing or any reason at all. to avoid trojans/exploits
in my eyes i could have wrote the exact same review without even handling, testing the hardbit. so please OP get into better detail about the chips in side, the OS, security risks, exploitability.
for instance just this small sentence alone " There is also a USB power cord and dongle to plug it in." already makes me question the exploitability of it. a proper review does not leave more unanswered questions then before the review is read.
please dont make reviews that are harmonic, pleasant, and PR positive for the company. instead be honest, detailed and explain the benefits AND risks.