LORA LORAWAN Gateway supporting 3G 4G dongle/connectivity

Hi everybody
asking for help to find alternatives to Gateways for Lora LoraWan application

I need HW able to support natively or via USB port a 3g / 4G connectivity
I tested Draghino and I analysed Kerlink
Draghino : I m not able to let him see my USB dongle 4G (that in a standard computer test , give me connectivity)
Kerlink: has proprietary backend I want to develop myself without spend for a service I don't need

other possibilities ?

LinkLabs may be helpful to look at.

REXLAB router?

http://www.odins.es/en/project/rexlab-router/

other suggestions?