08-14-2012 11:33:17 AM - edited 08-14-2012 11:36:24 AM
The AT&T speed test isn't very accurate to be honest. If I use the test on my 3 down plan it shows me getting about 6.5 Mbps which is very false .
http://speedtest.verizon.com/fios300/# seems to be the most accurate for me atleast.
08-14-2012 12:53:33 PM - edited 08-14-2012 12:58:42 PM
Was this test run on a PC with Wi-Fi connection or was it connected via Ethernet cable to the gateway/modem? Be sure to run all speed tests through a cable connection...NOT through Wi-Fi. The download speed is guaranteed to be at least 80% of the speed you subscribe for AT THE ETHERNET OUTPUT from the residential gateway.
As an example.... In my own situation, we were getting very close to our subscribed speed as long as I ran the test on my desktop PC which is connected via cable. BUT.....on our laptops and my wife's iPad...which are connected via Wi-Fi home net....the speed was very low. Especially in the evening hours. A little checking revealed that we had a plethora of Wi-Fi home networks in our close-by neighborhood. All on the 2.4 gHz band. I purchased a dual band wireless router and installed it behind the AT&T unit. Now we have our home Wi-Fi net on the 5 gHz band....only one in the neighborhood....and our wireless speeds test out equal to the tests run on the PC connected by cable. In other words...local congestion on that 2.4 gHz band seemed to be the problem. I'm not saying you have the same problem but this is why you need to be sure your speed tests are run on a cable connected PC.
For a free app. to check on population of wireless systems in your vicinity go to this site and download inSSIDer. Then run it and see how many are on the list.