Allow cascading TOH’s that do not need physical knobs etc on the outside (backside), to allow using 2 TOH’s cascaded. For example that awaesome camera TOH with grip, mounted on top of another TOH.
As STEP files will be available anyone could do that.
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Not eny 
3D printer is needed.
Public libraries often have 3D printers one can use.
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Also Chinese services like JLCCNC are pretty fairly priced and offer all sorts of printing technologies, as well as subtractive methods. Not sure who the situation is in the US with tariffs and such though but for Europe definitely an option. Even though for 3D printing I prefer to have it under my direct control. You can also get cutting and bending of sheet metals though as well. The backcover looks like it would be a potential candidate for that as well.
If that is really so, then very cool. I have never checked that.
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In the Helsinki area there are dozens of libraries, but only about half a dozen have a 3D printer. Get any more rural than that and I doubt the library staff will even know what one is.
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Wow, but that is great!
I am not aware that libraries in France have 3d printers.
I don’t know every library, ofc. I’d like to be proven wrong.
I take umbrage at that. I’m sure the people in my “rural” library know what a 3d printer is.
And a quick search shows that many more but capital region libraries actually have them.
Greetings,
— somebody who moved out of the capital region.
(and no, I’m not being too serious either 
)
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Inspired from this thread:
What about a TOH containing a self inflating module to make it float when it falls into water?
THIS would be a real sailor phone! 
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The quadcopter TOH could also save the phone in that case, it would just start hovering when falling over water, land or hungry crocodiles. Or, as the kids say, “why not both?” and call it the Chitty-Chitty Bang-Bang TOH.
Perhaps someone with mad AI skillz could render that concept!
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I haven’t read the entire thread, but I have searched and I wonder if anyone has mentioned a payment method TOH. Polar Electro (Finnish sports watch maker) do not have the size to be able to allow google/apple wallet software connections on their watches, so they sell a “smart strap” which is connected by a simple app that connects the NFC chip to the app to the bank.
It would certainly be something I’d interested in, and probably remove a few barriers for users who want their e-wallet app
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Seems like the NFC chip in the wristband is made by Fidesmo which is Swedish(?) company. Maybe, if there is enough interest, someone from community could contact them and try to R&D limited run of tap to pay TOHs with their technology.
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Indeed - Polar would be the wrong partner here. The consumer facing part in Sweden is Tapster - i have a ring from them. Works great. Not sure how the licensing deals look, but probably some exclusivity deals going on…
No, it most definitely isn’t connected via some app. It is a plain dumb card that’s linked in the backend. And thank god for that!
I went fully without app for 5 years with my Tapster ring (until i needed to refresh the card number) and have used it exactly once since (to do just that).
Nowadays i think the initial enrollment is app based, but ~7 years ago the app didn’t even exist.
However, i wonder what the usefulness would be of having this in a phone back. A google/apple/samsung pay at least lets you not have to punch the pin in on a potentially compromised vendor terminal. Not having to use a pin is however, imo, outweighed by risk of breakage, battery loss and theft - so very much a gimmick. Fidesmo/Tapster does not have the advantage - nor all disadvantages - but still.. what would the point be? Wearables are at least water resistant and not tied to your precious phone.
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My vision was using the I³C-connection for setting up the NFC chip through a native light weight companion app, that is used for setting up the chip and nothing else (well, maybe account management).
If that’s the whole point, it seems quite useless (=no reason to be in the TOH).
I don’t imagine Fidesmo would be interested in making a I³C interface, if it can already be managed properly via NFC.
That is why I envisioned it as a community effort to do the R&D, if Fidesmo is willing to play along, even if it’s a long shot in reality.
But if you can already simply glue an existing solution to the case, why mess with anything else?
It makes no sense to change interface!
(And gluing it to a phone seems pretty dumb - see above).
Years ago, they actually had an agreement with Nokia. I think it could be considered again, since there was a time when they worked well together. I don’t think the licensing agreement would be too strict.