I understand the urge many of you have to switch from the iPhone 4 to the SGS2 but now that I'm back on the iPhone, let me give you my thoughts so you can make an educated decision. First off, the GS2 is an AWESOME phone but I believe most of you will miss iOS after ~2 weeks. There are still too many little nuances that don't seem like a big deal at first but the more they creep up, the more annoying they get. That being said, the GS2 FLIES in everyday use and the web browsing experience and speed is truly incredible. You need to really use it to understand what a 1.2ghz dual core device with 1gb of ram can really do. I do wish Samsung left stock Android on the device as I really didn't like TouchWiz. Anyone who does get a SGS2, I recommend using a different launcher (I used GoLauncher EX which I really like). A few things that really annoyed me about the Galaxy S2: - Battery life was much worse than the iPhone if you're a heavy user. The Super AMOLED Plus display is beautiful (for media) but is not easy on the battery. If your screen is on a lot during the day, you will NOT make it through a full day. If you're a lighter user, it should be fine. - Vibrate settings are terrible. The phone vibrated for 3 full seconds on every email that I received and couldn't be changed. This became QUITE annoying on my desk in the office. - Even though the Super AMOLED display is gorgeous, you will quickly miss the Retina display of the iPhone. I use my phone more for reading text than looking at images so, to me, the Retina is a MUCH better display. Your usage may differ but if text is your primary use, you'll miss the iPhone's screen. - The phone felt kind of cheap in my hand. It's EXTREMELY light which is cool for a few days but it just doesn't have that premium feel of the iPhone. Now, to be fair, there are a few things I truly miss after switching back to the iPhone. 1. The iPhone's screen is simply too small. Once you use a 4+ inch display you will realize how cramped the iPhone's 3.5" display really is. 4.3" might be too big as the SGS2 didn't feel great in my hand but I think 4" is the sweet spot. Apple, PLEASE give us a bigger screen in the iPhone 5! 2. True multitasking...and this is a BIG one. Having my apps run in the background is so money. My newspapers, RSS feeds and IM apps (google talk, aim, whatsapp, etc.) all updated in the background without me having to open the apps first. This means when I went into the subway every morning and night, all my articles were ready to be read and I didn't have to remember to download them. Also, when I open an IM app I didn't have to wait for the app to connect before the message (that was already pushed) downloaded. I'm hoping Apple fixes their multitasking in the future. 3. Cutomizability. Even with iOS5 (which I'm beta testing), the OS just feels a little stale to me and the reason is that I can't customize it the way I could Android. This isn't a huge deal but I think this is one of the reasons many people feel like they want to try something new. 4. Speed. This is due to the processor and RAM so I expect this to be rectified in the iPhone 5. Before anybody asks why I didn't just post this in another of the numerous GS2 threads, the reason is b/c I want this post to be seen. There are many users who are considering a switch to Android and I want to give them some honest feedback from an iPhone user who made the move and switched back. If this helps them, it's worth it. If anyone has any other questions they want me to answer, feel free to ask. EDIT: I also want to add that one of the things that REALLY annoyed me about the SGS2 is that I couldn't control the music player with my headphones. You could play/pause the music but you couldn't control the volume or skip & previous which was a pain.