IPhone 12 attached to 4G but no IRAT to 3G

Devices
21

Hello.
“Due to one parameter setting in RNC which require UE also send not only 3G-capability, but also 4G-capability.”

Somone know the name of the parameter on Huawei RNC if we want disable that?
Thanks

22

It’s UCELL SIB, I think.
But I can’t remember the exact MO name.