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.
Try again after each step: 1  Go to Settings > Sounds and drag the Ringer And Alerts slider to turn the volume up. 2  If you hear sound from the speaker, follow the rest of these steps. If you can't hear sound from the speaker, contact Apple Support. 3  If your device has a Ring/Silent switch, make sure it's set to ring.