I purchased the gateway router and I can not get it to detect the new Att SIM card I purchased. The SIM card is verified and correct. I believe my router may be different and lacking the correct SIM card slot. As you can see in the pictures, mine does not look like the one in the manuals or that others have posted. It looks more like an SD slot. I have followed all the manual directions at least 10 times and still can not get it to detect the SIM card. I also called att and they verified all the correct settings. Help!