Been lurking on this thread but haven't posted until now, I guess because I didn't really have much to add. But, I finally decided it's time to add my voice to the cacophony, in the hope that it might help draw more attention to the problem. I'm coming from a Blackberry Storm II that I had for 2 years. I went through all this same BS with the Storm and switched to the iPhone because all my Apple-loving friends swore to me that I would love it because it "just works". Well, not mine. From the first day I had my 4s I noticed significant battery drain; at first it seemed like I was losing easily 7%-10% per hour if I did absolutely nothing with the device; much more if I had the audacity to actually USE the thing. I came here (and elsewhere) and found that I wasn't alone. Having dealt with battery drain issues with my Storm, I knew what to do to staunch the flow. I am in the habit of turning off apps when I'm not using them (and I do not have all that many app's to begin with); adjusted my screen brightness down; I tunred off the auto date/time and other updates, etc.; I did a full discharge and recharge of the battery. However, I NEED push email for work, so couldn't turn that off. I was so happy when I woke up last Sunday morning to the notice that I had iOS 5.0.1 ready to install, stating that it should fix the battery issue. After the install, I decided to restore all the settings to where I had ideally wanted them ... and I was quickly appalled to discover that my bettery drain problem had actually gotten worse, and not better: between 15% and 20% per hour if I did so much as make a phone call and/or respond to an email or two or a text or two. I decided to see how long I could go with what I considered light normal usage, just as an experiment. I made it less than 6 hours and had to plug it in. This was doing no more than, again, a couple phone calls, a hand full of texts and emails, taking a couple of pictures, and checking FaceBook a couple of times; turning off all apps when not in use. So, I went back to all my battery-saving settings, but my battery drain is STILL worse than it was before the update. I turn off wi-fi and bluetooth when I don't need them, and anything else I can think of. Still horrible. Plus, I started noticing that Siri was constantly fritzing and telling me she was having problems, couldn't access the network, needed me to retry my request later, etc. I have since read that this also seems to be a side effect of the iOS 5.0.1 update. To say the least I am EXTREMELY unhappy. I would be okay if I had to be a LITTLE cautious about usage and/or if the battery drain were a LITTLE more than I had expected ... if I were able to use the full features of the phone as advertised! But, part of the reason I switched to the iPhone was so that I woudln't have to jump through all these hoops like I had to with the BB for the last 2 years. Like DJ So Steve says, we shouldn't have to go through this just to get the thing to work properly. I have exactly 1 more week before my 30 day return window is up, and I am sincerely hoping they fix this before then. If they don't, I may have to jump ship. Thus far, Apple seems even less responsive to problems with their devices than RIM was. I absolutely hate the idea of going back to a BB (and, as much as I wish it were not the case, Android just may not be an option for me), but sometimes it may be better to stick with the devil you know, after all.