Can I have a micro sim for Iphone4 and not subscribe to a data package?

The iPhone 4 supports micro SIM cards and not the normal Sim cards?? I didn't know that. Anyway, just cut your SIM card using a pair of scissors.

Check these:
bit.ly/fCUNKQ
bit.ly/d5U25G

And yes, any SIM cards will work on the iPhone if it is unlocked.

Do you already have an iPhone 4 and just need a sim card? Many people have been successful in just cutting their current sim cards to the size of the micro sim and it works perfectly with the new iPhone. If you're not confident doing that, you can get the sim cutter for a fee at iShop in Phoenix.