I was trying to play Archetype and I noticed it lagged like s**t, so I thought it was the server.. But no, it was my fault. By holding the iPhone 4 in landscape, covering the black thing near the headphone jack, you can kill your WiFi signal.. I tried using Speed Test, and the results are: 1. 1200kb/s down and 1300kb/s up without touching the line on the top 2. 1.2kb/s down and 1.1 kb/s up by holding it there(you need to apply some pressure, but it will kill the wifi..) By touching it with my finger it didn't really do anything, but if you place your hand there(no pressure) it drops to about 600kb/s.. It's not such a big deal, but it can be annoying.