From doing a simple google search, as well as going through threads on xda forums, it appears both devices suffer from the same bug. Whether it affects all devices is questionable, but it is concerning. When on 3G (or HSPA+) the phone has an alarming amount of wakelocks, not allowing it to go into deep sleep. This results in massive battery drain. I even tested the Optimus G for a few days and it was definitely present. There are threads for every version of the OG on XDA, and people are reporting the issue on each one. The Android OS is generally using up to 55-75% of the battery due to these wakelocks. I returned the OG for the iPhone 5 because of this. No one seems to know whether its a software or hardware issue. I wish it would be fixed, cause I'd possibly keep the OG over the iPhone 5.