No mobile data on my samsung s22 ultra

I used to have mobile data on my samsung in my house but not anymore.i only have emergency service and can't call unless i am connected to the wifi but the iphone on the same plan works.i notice in some specific areas,the mobile data comes up and i have gone to xfinity store where the mobile data works all through. They checked and even changed my Sim card but once i got home,mobile service dissappears but iphone gives a 5G Network. This started like 5 days ago and i need a solution but if this remains i will have to change my service provider