A given computer display system will have a maximum resolution that depends on its physical ability to focus light (in which case the physical dot size-the dot pitch-matches the pixel size) and usually several lesser resolutions.
Using the Speakerphone in Calls. You can turn on your iPhone's speakerphone when you make a call and the recipient answers, or when you accept an incoming call. In both cases, a menu screen appears on your iPhone.To switch to speakerphone, tap the Speaker button which turns blue when activated.To turn off the speakerphone at any time during a call, tap the button again.n both cases, a menu screen appears on your iPhone. To switch to speakerphone, tap the Speaker button which turns blue when activated. To turn off the speakerphone at any time during a call, tap the button again.
Muting Your Voice. To mute yourself while on a phone call, tap the Mute button on the call screen. This screen appears automatically when you move your iPhone away from your ear during a call.If you're using a hands-free setup, wake your iPhone to see the screen with the Mute option.uting the Speaker. To mute your iPhone's ringtone and other alerts, slide the Ring/Silent switch on the side of the phone so that you can see the red stripe. Some apps and alerts, such as music players and alarm clocks, will produce sound even with the switch set to Silent Mode.