Performance and iOS 7
We don't have exact measurements and don't need any. The iPhone 5s is the fastest smartphone around. Applications launch instantly and graphic-heavy pages load fast, even on slower Internet connections. Part of this is due to the fluidity of iOS 7, a valuable upgrade from Apple.
One needs about ten minutes to get comfortable with iOS 7 and may face some minor frustrations at first. But iOS 7 looks more refined and operates more intuitively. The best thing is the much-needed addition of the Control Center, which can be activated by a swipe from the bottom of the screen. You can turn Wi-Fi on and off, change Bluetooth settings, and even put your iPhone in Airplane mode. There is no need anymore to go digging through the settings.
The iPhone's 64-bit A7 processor works well, but the "64-bit" part looks much better on paper since there are barely any apps that can take advantage of the processor right now. The iPhone 5s will also need more RAM (the 1GB RAM isn't as bad as it sounds though) to take advantage of the processor.
Apple has always been the King of Multimedia, but the 4-inch screen hampers things quite a bit. Viewing The Dark Knight on the Galaxy S4 and doing the same on the iPhone 5s is a little frustrating. However, Apple still excels in the music department.
We aren't sure if it's the iPhone 5s or iOS 7, but music has more of an "oomph" to it than it did on previous iPhone units. However, we were disappointed that iOS 7 doesn't allow you to automatically playlist a genre of music -- this is a major oversight on Apple's part. However, there are third-party music apps that can easily do this.
The 8MP camera on the back of the unit has been improved with optical (rather than digital) image stabilization and a dual flash, rather than a single one. The iPhone 5S certainly takes better pictures than the iPhone 5 did, especially in darker situations.
The iPhone 5S still takes high quality 1080p videos. It's a shame that the iPhone still can't record in stereo sound given everything else is absolutely perfect. Let's hope the iPhone 6 changes that.
As expected, the phone quality is excellent. We tested it on Sprint's network throughout the Los Angeles area and the clarity of the caller on the other end is amazing. The Samsung Galaxy S4 and HTC One also offer excellent call quality, but the caller on the other end always sounds a little muffled. Some callers said we sounded like we were on a landline phone, even with third-party headsets.
The speakerphone is good, but still sounds a little quiet as it did on the iPhone 5. Android phones may not have Apple's speakerphone clarity, but the volume has always been louder.