I have AT&T U-verse for my internet and television. The built-in wireless on the U-verse gateway has been spotty at best, with download speeds fluctuating greatly between 12Mbps (which is the speed we are paying for) down to 1Mbps at times. I'm getting these values from these speed test sites: speedtest.net and speakeasy.net
At AT&T's recommendation, I purchased a separate wireless router and have disabled the wifi on the AT&T gateway. I purchased the D-Link DIR-855 wireless router. The download speeds I'm getting now are consistently good (around 11Mbps); however, my upload rates are crawling (around .5 or less Mbps, as compared to what we should be getting at 1.5Mbps). I don't know why this is. Could there be something that I have set incorrectly in the settings for either router that may be causing this issue? How can I best troubleshoot this problem, so that I may correct it?
Thanks for any suggestions.