Buy new iPad WiFi or 4G

I have an iPhone 4s and I might buy an new iPad. I am unsure whether to get the WiFi only version or 4G. Can I use the iPhone's micro sim to the new iPad for internet connection?If the 4G network is supported in your area with your local Carrier, you can choose 4G model. If you use your phone as a hotspot, you can probably get the wifi only model. However, using other micro sim isn't supported by