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.
Steps to turn on iPhone without power button. 1  1. Plug the device into a wall outlet. 2  2. Alternatively, plug the device into a computer. 3  3. Unlock the device as soon as the screen lights up.  Note that if your iPhone's battery is depleted, it may take several minutes of charging for your device to power on.