The equals sign means is equal to. It is telling us that one thing equates to another; that they are the same.
The iPhone 4 is the most recent iPhone to be discontinued from the iOS Update cycle. It did not receive the iOS 8 update, so it's final software version is iOS 7.1.2. You can update to this version through iTunes, or download it from an IPSW repository like this website: https://ipsw.me/.
The iPhone 3Gs (2009) got its last update in 2012, the iPhone 4 (2010) will not be getting another update. Next year the iPhone 4s will get its last update. The following year, the 5, and subsequently the 5s. 64 bit or not, I don t see that playing any role in the update cycle at least.he iPhone 3Gs (2009) got its last update in 2012, the iPhone 4 (2010) will not be getting another update. Next year the iPhone 4s will get its last update. The following year, the 5, and subsequently the 5s. 64 bit or not, I don t see that playing any role in the update cycle at least.