How to tell how strong your iPhone's signal really is

The signal bars on your iPhone don't tell the whole story.Your iPhone may appear to be telling you that your signal is at full strength, but the true connection is actually more nuanced than that.If you want to see how strong you iPhone's signal really is, follow these steps, which Tech Insider recently demonstrated in a how-to video.Open your phone dialer and enter the following code.Press the call button.You'll see your normal signal bars disappear. You get these numbers instead.See the rest of the story at Business Insider NOW WATCH: Meet 'Edge,' Microsoft's bold answer to Google Chrome
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