I ended up going with the ZTE MC7010 and I must say I am very happy, speeds of 100+Mbps regularly, and even strong signal during loadshedding when the phone is dead in the house. And its 5G ready for if/when MTN rolls it out.
How did you manage to connect your RCT to windows via USB? I have an RCT-Axpert VM 2k, when I plug in the USB I get the windows USB sound, but ViewPower does not pick up the device? I have tried Ubuntu as well, and same story. I can see the USB-Serial Cypress device in Ubuntu when I run 'lsusb...