Region : UnitedStates

Model : TL-MR3020

Hardware Version : V1.2.0

Firmware Version : 3.17.2 Build 140610 Rel.65031n

ISP :

TL-MR3020V1
Firmware 3.17.2 Build 140610 Rel.65031n

Samsung GT B3740: is identified but cannot connect. No signal etc. shown just "identified" and "connecting ...". Uploading a .bin file (made one myself) changes nothing
Huawei K5150: "identifying" never stops showing. Also I am never asked to upload a bin file because of an unknown device.

This device is getting at me .. I am really fed up.

Is there a firmware I should try that supports LTE mode other than the one I quoted?

HELP Please!