Pay As You Go Users $3/Month - Can you try to call forwarding real quick?

Some one on the forums said no, but I called TMO sales they said yes, I don't know who to believe. I really need to know before I choose T-Mobile.

I'm interesting in unconditional call forwarding but do any of them work if that ones doesn't?

****21*1+PhoneNumber#Turn on unconditional forwarding (CFU) to a number##21#**Turn off unconditional forwarding

****61*1+PhoneNumber#Turn on forwarding if no reply (CF NRY) to a number##61#**Turn off forwarding if no reply

****62*1+PhoneNumber#Turn on when not reachable (CF NRC)##62#**Turn off call forwarding when not reachable

****67*1+PhoneNumber#Turn on call forwarding when busy (CFB)##67#Turn off call forwarding when busy

**61*18056377243**seconds#****************************

Change call forwarding delay time. Choose a 5, 10, 15, up to a 30-second delay. For example, dialing **61*18056377243**10**#** would be for a 10-second delay.

Thanks

(damn wish I could edit the title)