Hi Guys, I just bought my iPhone 6s 128g with the iOS 10.2 This is the first Apple smartphone for me so i have no any experience of this. But days later the system recommend me the new version of iOS 10.2.1 Should i upgrade? I just want to know the difference between the newer one and the current version. I have no idea about whether to update or not. And i have no idea about how much storage will my phone load the new version. Any suggestion? Thank you in advanced.