GSM or CDMA?

both? Not sure what you're trying to ask.

What carrier is the phone for?

well if it says GSM and cdma then it's both...

I think the iPhone 5 is a world phone, so it supports both CDMA and GSM networks.

The iPhone 5 supports both GSM and CDMA but there are three different versions operating on different sets of frequencies for different parts of the world.

All iPhones have GSM, certain models have CDMA as well, such as Verizon and Sprint in the US, KDDI in Japan, China Mobile, and so forth.

(International carriers not accurate , It could be AU that is CDMA in Japan, not too sure).

To help us hep the OP however, we need to know what carrier he/she is using it on. If AT&T then its just the plain jane GSM model.