Where on these phones are you seeing the hardware manufacturing date?

Thanks!

The easiest way that I know of is to type ##786# and Manufacture Date is listed in the list.
Be careful as this is the same command you need to do the 'EVDO ring-through hack' which hard-resets the phone.
Do NOT press 'Reset' if you don't intend on hard-resetting your phone, exit out of the screen with the 'x' in the top right.

ahh ok thanks. I was actually planning on doing the 'EVDO ring-though hack' and I'm in the processes of making sure that my phone is one of the ones that the hack *should* work on. My PRI version is 1.13_003 and I'm on the new ROM - so only thing left to check is the manufacturing date - looks like I might be able to do it on this one..