A:AnswerIt has for other model but I do not have for which I bought. You can opt WIFI+Cellular so you can get SIM Port. But with WIFI you can not use SIM as there is no SIM PORT available. It is little expensive though.
A:AnswerIt will almost definitely be more trouble than using a PC laptop, but yes, you can. You will need a Lightning port adapter to a standard plug such as VGA (the blue video computer plugins that have been around for ages), or you can AirPlay to an Apple TV. You will also likely need PowerPoint installed on the iPad, which is available in the App Store.