RAN lab for device test

Hello all
I’m in charge to replace our current lab with a brand new environment that includes 2G/3G/4G and 5G. That covers technologies for IoT ( LTE-M and NB-IoT) and services like VoLTE and SMSoIP.
I’m wondering if someone can give me some company names that you have using equipments like this. Companies like AMARISOFT and Noffz.
Looking forward you answer.