npatel1, this is really odd. I am sorry to learn that you are having trouble with calls and internet access. I have an iPhone X as well with the new software and didn't encounter this specific trouble. Let's get it figured out.
By chance, have you powered cycled the phone? How about resetting the network settings? (http://spr.ly/66041HK44) What happens when you try to make a call or access the internet (without being connected to Wi-Fi)?