Hello, 

I recently purchased an Inhand IR302 to provide a cellular connection to a computer via ethernet. I have a SIM card that I put in the IR302. When I configure it for AT&T it says “detecting modem” and after a few seconds it connects. However, after a few more seconds it then disconnects and the cycle of connecting and disconnecting repeats. I have put the SIM card into a phone and verified that it works properly and is receiving good signal. I am using the antennas provided with the IR302 and the power connector provided. If anyone has ideas or any troubleshooting steps I should take please let me know. I can also provide additional information if needed. 

Thanks,

Ben