I just bought a S8 and had an iPhone 5s, I removed the Sim card from my 5s and put it in my S8 now I can't connect to my cellular internet?

And I also can't send messages or phone call please help me thanks alot also my Carrier is MetroPCS

Read more: https://iphoneus.org/faq/i-just-bought-a-s8-and-had-an-iphone-5s-i-removed-the.html