I have spent almost 2 and a half years on my Galaxy S3 and as my phone is becoming increasingly difficult to use, I am looking for an upgrade. I am not at all an apple fan (I actually regret buying a MacBook Pro, as this has severely limited my computer's versatility and at the same time I have less number of apps/softwares available to use). Still, just with the thought that buying the iPhone 6/Plus will help my phone couple with my laptop, I have seen at-least 20-30 review videos and have learnt that though both devices are not 100% flawless, I would perhaps enjoy using the Note 4 more than I would like the Apple product (I am a utility person and as I have gathered, you cannot do much on your iPhone other than make calls and run a few apps and games and the basic stuff which even the cheapest smartphones can do albeit they won't have the apple logo!). Now, as I have decided to move back to Android, I have a few questions. 1. My experience with TouchWiz was not great. I started having problems with my S3 from the very first day I bought it (international version, 1 gig of RAM) and a factory reset did help. I admit that this might be a device problem with my particular device and I should have rather got it changed. http://androidforums.com/threads/unfortunately-touchwiz-home-has-stopped.604825/#post-4974313 Is the TouchWiz UI better on the Note 4? 2. Samsung phones in general tend to develop a noticeable lag as they age. I don't know what if this is true for other flagship devices but I have seen this on several of S3's and other low end smartphones. 3. The battery: My experience with the battery on S3 wasn't great as well. It started off weakly with me sometimes having to charge the phone twice daily and now is in a situation where I cannot even get 6 hours standby time with my screen off 90% of the time (and wifi on the background) and I replaced my battery with an original samsung one just 2 months ago! 4. One big question on my mind is whether to go for the Note 4 or wait for the Galaxy S6. I would like to get the stylus experience with the Note 4 but am also tempted to see what Samsung has in store (and if possibly they are getting rid of TouchWiz). 5. Is there any chance of the Samsung rolling out Note 4 with Android 5.0 out of the box in the near future? Does Android updates tend to slow your phone down? I have experienced something similar with my S3. Since the Note 4 is comparatively new now, haven't really heard of any performance issues yet. The reviewers rate the performance and battery life very highly, but it would be good to get some hands on review from people using the phone!