Apple’s default programs could only be removed since the iOS 10 update. The 3.0 update added a system-wide search, known as Spotlight, to the left of the first home screen.
GSM models of the iPhone use a SIM card to identify themselves to the GSM network. The SIM sits in a tray, which is inserted into a slot at the top of the device. The SIM tray can be ejected with a paper clip or the “SIM ejector tool” (a simple piece of die-cut sheet metal) included with the iPhone 3G and 3GS in the United States and with all models elsewhere in the world. Some iPhone models shipped with a SIM ejector tool which was fabricated from an alloy dubbed “Liquidmetal”. In most countries, the iPhone is usually sold with a SIM lock, which prevents the iPhone from being used on a different mobile network.
Users can also add and delete icons from the dock, which is the same on every home screen. The dock holds up to four icons and is located at the bottom section of the screen. Users can delete Web Clips and third-party applications at any time and may select only certain applications for transfer from iTunes.
The first-generation iPhone SE features the same 12 MP camera found on the iPhone 6S and iPhone 6S Plus models, with the same 4K video capability, but its front camera only has 1.2 MP. On all five model generations, the phone can be configured to bring up the camera app by quickly pressing the home key twice. On all iPhones running iOS 5, it can also be accessed from the lock screen directly.
Apple’s own headset has a multipurpose button near the microphone that can play or pause music, skip tracks, and answer or end phone calls without touching the iPhone. Some third-party headsets designed for the iPhone also include the microphone and control button. The current headsets also provide volume controls, which are only compatible with more recent models. A fourth ring in the audio jack carries this extra information. On the bottom of the iPhone, there is a speaker to the left of the dock connector and a microphone to the right. There is an additional loudspeaker above the screen that serves as an earpiece during phone calls.