Hi all. I'm looking to up the security of my holdings and want to do things in the best possible way. I wanna go full-paranoid mode. Here's what I have in mind:

I am looking for an (android?) device that is physically incapable of wireless comms: no BT, wifi, or celular. Or a device that can be modified to physically remove these features permanently. But it needs NFC since I want to use it to program Tangem cards.

That's it: NFC capable (to set up Tangem via side-loaded app), but otherwise fully HARDWARE air-gapped (for seed generation).

I'm not interested in any software solutions to airgap the device. (That means: no airplane mode, no custom ROMs, no router configuration to block the device-- I want it to be physically impossible for the device to ever connect anywhere)

Here are the options I've explored so far and my concerns:

Buy a small laptop and remove the wireless adapters - This will work for seed generation, but there doesn't seem to be any way to use NFC with an emulated android app. Would need a usb NFC antenna and an emulator that supports the feature and that particular hardware. If anyone knows any solutions to this I'd be very interested since this would be the easiest option for me.

Pinephone - A phone that has physical kill switches for wireless comms. Really cool idea, but I don't know that these switches don't just tell the software to turn things off. Phone doesn't support NFC natively and the idea for an attachable NFC cover won't be coming to fruition.

Buy and modify a phone that supports NFC - Preferably something with a higher level of 'repairability,' although this isn't a huge factor. And with discrete and dedicated wifi/BT, and GSM chips that I can just flick off of the board. I had an old Samsung Note 3 I tried modifying. I learned that simply removing the comms antennas does not disable any of the wireless features, it just attenuates them a bit. So then I removed the GSM chip and successfully disabled cellular, but removing the chip that handled wifi/BT (and apparently other stuff too) resulted in the device being unable to turn on. So I've been doing research trying to find a phone that can be modified in this way.

Let me know if you guys have any other ideas. Thanks