How to tell if your refurbed 3GS is tethered or not?

[Dealwagon]

I just swapped my original 3gs (tethered jailbreak only) for a refurb do to an issue.

NOW, how can I tell if this one will be tethered or not?
Serial is 5k000xxxx. odd. I know the old, if your serial is less than, blah blah blah, but this is very different.

 

[dragonc12]

wow. yeah that's a strange serial number. I think i would just run blackrain, then reboot and see what happens.

there is also a pretty good guide here on everythingicafe...