About carrier aggregation RM520N-CN

Hello all, I got a 5G RM520N-CN and wanted to ask how many CA can it do? also can it do 4G and 5G together? and how to do it use at command ?

Dear @CycleStudies
RM520N supports SA and NSA.
For ENDC document, please contact with your provider firstly, they have access to get it.
Or please share the combination in your region, I will check later.
Thanks for your understanding.