For the past few weeks, I have been having trouble with my internet. I first diagnosed the problem as being an issue with my wndr3100v2. After getting a new router, wndr3700v4, I noticed the same issues. My speeds would be perfect (30 Mbps down, 5 Mbps up) whenever plugged directly in to the router via ethernet. When I am using wireless, my speeds fluctuate from 20 Mbps (down) to 1 Mbps. After I returned the wndr3700v4, I purchased a belkin n600 db which experienced the same issue. I replaced the ethernet cord from the modem to the router; I can't figure out what the issue is. The next thing I may try is replacing my modem but why would I have perfect speeds when plugged directly in to it but terrible speeds when using wireless? I have done speed tests on other wireless devices so it isn't just my computer. Also, last month my internet worked perfectly and I had no issues so this is a recent issue.
Any help would be amazing. Thanks.