I recently lost my android phone which was providing internet access to my AR-150 (and sometimes MT-300N) via the USB (USB tethering mode on my phone). As I don’t really need a phone, just a source to provide USB internet access to my GL-iNet devices, I’m thinking I should just buy a USB modem.
My GSM service provider does provide LTE (T-Mobile US, 1700/2100 MHz AWS (band 4, 12)), so would prefer a device that covered these. But would prefer a solid, hassle-free 3G experience over fragile or troublesome 4G.
I understand your reasoning. That said, a detailed HowTo, including a list of well-tested 3G/4G hardware, will certainly help sales. Seems that the ROOter folks have done a great service here, and if it works well, this could be a very nice product for your company!