I had some wifi connection dropping issues with my One X. I don't appear to have the "you're holding it wrong" issue (the squeeze test comes out negative), but some googling found that there seem to be issues with 5 GhZ WiFi bands as well.
It eventually turned out to be some sort of known incompatibility between the One X and my router's firmware (a router update fixed it), but in the process of testing, I tried to disable 5 GhZ WiFi. However I had to disable the 5 GhZ band on my WiFi router (and thus disable it for all my devices) because I couldn't find a way to disable it on the phone.
A posting in the thread above contains
In the WiFi settings, under the menu, "WiFi Network Bands", select "2.4 GHz only".
However I cannot find such a setting. Am I just blind? Or is there at least another way to disable 5 GhZ on a (non-branded, non-rooted) One X?