Make sure your routers can take external antennas, if they have removable antennas then it should be fine. I use a Poynting 4G Xpol. Obviously you need 4g antenna for 4g or a 5g antenna for 5g.
Interesting. So you admit to casual racism. Well I suppose acknowledging ones faults is the first step to addressing them. Now if only you could admit to your verbal diarrhoea.