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.
1 If you can't hear sound from the speaker, contact Apple Support. 2  If your device has a Ring/Silent switch, make sure it's set to ring. 3  If you can see orange, it's set to silent. 4  Restart your device. 5  Open an app that has music or sound effects. 6  Adjust the volume with the volume buttons or the slider in Control Center.