RBwAPR-2nD&R11e-LTE Band 20 issue (Vodafone CZ)

Hello all,

my modem RBwAPR-2nD&R11e-LTE doesn’t work at Band 20 within Vodafone CZ LTE network. It does “somehow” connect, but there’s no throughput, just kbps speeds which are overhead communication I assume.

RouterOS 7.15 installed, didn’t work with older OS/FW too.
Band 3 works fine.
MTU1480
Revision MikroTik_CP_2.160.000_v021

Unfortunately, the Band 20 is the only available at desired installation location. May the modem be outdated? Ready to provide any additional info.

Thank you.