A:AnswerYes, it is wall mountable. They suggest this one:. See if your exiting matches these dimensions.
https://www.bestbuy.com/site/rocketfish-tilting-tv-wall-mount-for-most-32-75-tvs-black/9881868.p?skuId=9881868
A:AnswerNo, it has one on each end. And they aren't real steady, they wobble in the TV and I'm afraid to tighten the screws too much fearing I will strip the (plastic) threads in the TV. Overall, though, the TV is worth the price.
A:AnswerIt depends which type of smart phone you have . With my IPhone 8 , it is straightforward to connect to the internet via the smart tv. First, I use the remote control to select internet . If your phone is not connected automatically, click “Troubleshoot “ in your smart tv to set up hot spot connection. You need to make sure that you go to settings in your smart phone and choose Hot Spot. You need to click on the password for your hot spot. The tv will pick up on your smart phone hot spot. Then you should be connected to the internet via your hotspot .