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/.
It was the most eagerly anticipated handset launch this year, and now Appleâs iPhone 6 has been named the fastest on the market. Independent researchers tested the processing speeds and performance of the latest phones from Apple, Samsung, HTC and LG. They found that Apple's iPhone 6 was the fastest, followed by the firm's larger iPhone 6 Plus handset and the Samsung Galaxy S5 (all pictured) Apple's older iPhone 5S model came fourth, followed by the HTC One and Samsung Galaxy Note 3.