I think it should have a COM port. you may use some software such as PUTTY to find the COM port.

It seems the 3G connection is not so stable. Firstly you need to make sure the modem is working fine on the computer. Plug the modem to the computer and see whether the problem persists or not. If...

Perhaps you can plug the computer into the modem and make sure the modem is working properly with the computer. after that, reset the router and reconfigure to see whether it will work or not.

Here is the RMA policy they have: http://www.tp-link.us/support/rma/

I'm afraid that is the case. I once had that adapter and got the same issue, then I checked with the TP-LINK Support who told me that Soft AP of this adapter was only available on windows 7:( Their...

The system log seems to indicates the APN and dial number are not correct. Maybe you can check with your internet service provider whether they are the correct one. Or you can plug the modem into the...