What model is my iPhone 5s (A1530) gsm, global or cdma?

Check here > What are all the differences between the iPhone 5s models?

iPhone 5s - Technical Specifications

Although the answers provided below are somewhat good.. they won't give you the specific info you need.

If you know your Serial Number, than you can look up your specific phone specs here:

http://www.everymac.com/ultimate-mac-lookup/

If you don't know your Serial number (you can get it under Settings, About), but you know your IMEI number (usually on the back of the phone, then you can go to this site below, and get the serial number, and then go back to my original link to get the specifics of your phone:

http://iphoneimei.info/

Cheers!

ColtonYVR