Which phone bands iPhone 12 supports?

Hi guys,

I just wanted to know if iPhone 12 supports both CDMA and GSM bands. I figured that it is GSM (900Mhz - 1800MHz) that is mostly being used in my country but I thought it would somewhat be useful to have both phone bands.

Also I just wanted to know if I were to buy an iPhone 12 from online apple store, how do I specifically buy an iPhone 12 model which supports both GSM and CDMA.

Thanks in advance.