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 6 and the iPhone 6 Plus are Appleâs best-selling iPhones of all time, and Apple fans have found lots of things to love among the new phonesâ hardware and software features. But Appleâs most recent releases arenât perfect, despite the companyâs reputation for polished interfaces and impeccable design choices.