My boss is trying to get me a number from there. Here is what we've tried so far:
From internet, you have to enter a chinese ID card number... FAIL
So we gave them a phone call to ask where there was a Unicom shop so a foreigner can get a Sim Card and phone plan.
They told us the address of a shop, but cannot tell us if that shop can open accounts for foreigners.
Asked where we could get that info
Good! It seems we just have to call another phone number and ask them.
So we ask which is that other phone number and the answer is "I'm sorry I'm not allowed to tell you".
My boss knows a senior manager at china unicom so he just asked him and it seems that for real, they haven't thought of any way for a foreigner to get a number from them.
I still can't believe this is true. I'm sure some foreigners use that (if you got it from your company that doesn't count).