@Kevin_Z 

I read all threads and found that you are putting the questions in loop that result no any support or solution like SIM size, what type network, what SIM, what supplier what. what.. what.. what and there is never any answer. If someone mentioned that it was working fine earlier that why you are asking nonsense question if SIM size is correct, is SIM functional, did you reboot etc

Trust me I have done everything, correct SIM, reboot, tries with other device, tried in phone, tried in same company 4g Dongle fully functional SIM in other device, properly inserted.

Contacting with the supplier does not help

I am doing job like you people, did not have time to call during working hours. I sent mail to customer support and it has been one week, no one responsed yet.