I knew it was too good to be true...

So, I have purchased a rebel simcard no cut for iphone 3G from rebelsimcard website.
I have received 2 rebel simcards: v.64 and v.72 , I have tried them
both, following the instructions on the website, but the result is "
no SIM " .... it doesn't work.

My iphone version is 2.2.1 so the rebel simcard has to work, as stated
on their webiste.

My carrier is O2 and I'm trying to use a Vodafone sim.

Can anyone help me with this issue and pointing me in the right direction?

Thank you!

There is no need to use SIM solutions anymore. There is software unlock available for your iPhone for free, thanks to Dev Team. Check this: How to Select an iPhone Unlock/Jailbreak Tutorial