@mrricheyrich:
USBNetwork: Gonna need more details that 'couldn't SSH in'. The K4 defaults to a different IP config than the K3, which might be what tripped you up.
As for the rest: Should have read more carefully, SSH on diags is only available on very old K4 models, which probably explains why that didn't work.
Now, you mentioned having Jailbroken the device, so you did successfully exit diags mode once. That rules out weird crappy diags build. What happens if you hard-reboot the device?
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