To enable a SBC connectivity there needs to be a known list of compatible HW.
I look at getting an LTE dongle that works with my local network provider. If other have LTE dongles that the have sued successfully, please add a comment here so we can build a list of make/model and provider that is comatible.
I ahve a EDIMAX Wifi dongle see http://www.edimax.com/edimax/merchandise/merchandise_detail/data/edimax/global/wireless_adapters_n150/ew-7811un
Which works with the Raspberry Pi, but it doesn't have an external antenna. I have order the following
They need to be tested for compatibility, but they should be better than the EDIMAX as they have external antennas
If you have experience of other adapters, feel free to post them to the discussion, Thx