Use Field Test Mode to See True iPhone Signal Strength as Numbers Instead of BarsUse Field Test Mode to See True iPhone Signal Strength as Numbers Instead of Bars Field Test Mode is a hidden feature on the iPhone which allows you to see technical details of the device, the most useful of which is the true cell signal strength displayed as a number rather than the traditional signal bars or dots. We’ll show you exactly how to enter Field Test Mode, as well as how to enable Fiel
