A:AnswerThe 4G connectivity is the Verizon version, the wi-fi connectivity is without cellular connectivity. You will have to click on verizon for the 4G connectivity version or click wi-fi which only connects through wi-fi (broadband, wi-fi hotspot from a phone or mobile hotspot device)
A:AnswerScreen resolution is larger on an s2, a tab a is 1080p (1200 instead of 1080 on the vertical dimension. Im typing my reply on a tab A) whereas the s2 isnt 4k, it is higher than full HD.
A:AnswerYes, you should be able to as almost all devices with usb-c connectors can support this, especially newer ones. There may also be options such as screen mirroring or casting with specific apps.
A:AnswerThis article states that the this tablet comes with S pen support.
https://www.zeebiz.com/technology/news-samsung-galaxy-tab-a-105-with-s-pen-unveiled-check-out-price-specs-57991
A:AnswerThe tablet was a gift for someone. I would suggest the best SD card you can afford, I'm sure the Best Buy staff would be able to recommend one.