Steve ... hep me bro .... I needs hep

!
Moved up to a 5G phone yesterday... 4G wasn't fine anymore (AT&T or T-Mobile) after years .... them bastids ... all BOTH of 'em

.
New phone keeps switching back & forth between 5GUC and 5G here at my house .... constantly interupting the data connection .... it's worse than 4G was

. I don't need the capacity of 5GUC .... how can I lock it on 5G?
Anyone know?
Gotta go mow some mo' .... back later... TIA!