whitequark: OK, now I'm getting this reliably (while still waiting for an answer from the seller):

```
I: g.device.hardware: device already has bitstream ID 6b69eb0afab807f261069c19ffbfc0bd
I: g.cli: running handler for applet 'memory-25x'
I: g.applet.memory.25x: port(s) A, B voltage set to 3.3 V
I: g.applet.memory.25x: JEDEC manufacturer 0xef (NEXCOM) device 0x12 (8-bit ID)
I: g.applet.memory.25x: JEDEC manufacturer 0xef (NEXCOM) device 0x3013 (16-bit ID)
I: g.applet.memory.25x: device does not have valid SFDP data: SFDP signature not present
```

Is this an issue of reading garbage or an issue of the flash not being supported?