Galaxy S21 5G--any way to disconnect from 5G and use 4G?

[IrishAyes]

New phone since Friday.  Got to work today and zero connectivity.  Apparently we have a Verizon 5G tower almost in our parking lot so the phone is constantly connected to 5G service . . zero connectivity.  Nothing loads.  took out the sim card and put it back in.  It connected to 4G for about 5 minutes and worked beautifully...until it automatically connected to 5G again and became a brick.  Same thing when I restart the phone.  I use my phone for work and cannot have it not connecting all day long.  Any way I can just use 4G service at this point and forget about the stupid 5G which isn't working?

[Predator7]

Use Samsung Band Selector from App store 

[Predator7]

 

[Predator7]

Here it is 

 

[dgcamero]

Thanks for the app link! Hilariously, the original LTE band 13 is best in Charlotte. It just works, and has ample bandwidth for normal internet to just work.