facetime problem with 4.1 on iphone 4

[Illuminator]

Hello to all!
I have an iphone 4 on custom 4.1 with pwnage tool at baseband 01.59.00 and at versionn 4.1
the phone was locked at atandt and now unlocked with ultrasn0w in Greece
the prolem is that i cnat use the facetim efeature and i am very very very nervous and anxiuous to use it basically!
lol
i saw the solution for the mits but i get a sim needed message
im wondering is this message due to the carrier i have with the sim card i am using?do i need a atandt card and the run the app?

[Simon]

facetime can be hard to activate on some carriers. You may want to give mitime a look. May be able to help. Not sure if it has been updated to support 4.1 yet though.

[Illuminator]

I have downloaded mitime install it and when i open the app it says sim needed
i have the 4.1 version and i think there is no way cos MITIME hasnt updated the version yet..
i think im very unlucky here

[Simon]

Hopefully it will be updated to support 4.1 soon.

[Illuminator]

Hopefully it will be updated to support 4.1 soon.

im stuck with an iphone 4 without a facetime!!!!
do you think i should downgrade so i can use the mitime?
or there is any other way to bypass the waiting for activation thing at the facetime options?

[Simon]

If you have SHSH and facetime is that important to you then ya you can try downgrading to see if that helps.