Your days of leaning out of an upper floor window in pursuit of a single measly bar of signal are over - there's a better way to hunt out phone-powering signal.

A secret iPhone hack has emerged that makes seeking out solid signal easier by showing you how good your connection is in a number rather than an antiquated bar chart system.

'How?' we hear you cry with call-blocked urgency. Well it's surprisingly simple, you just need to enter a secret code to pull up your iPhone's Field Mode tool.

The code you need to enter into your phone's call dialler is *3001#12345#*.

This beneath-the-surface menu offers a number of details on the inner workings of your phone, including a numerical signal strength indicator.

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Digital Spy

OK, things aren't that straightforward, your signal strength isn't going to be shown on a basic 1-10 scale.

Instead, shown in the upper left corner of the screena signal score of -50 marks a solid, video streaming-friendly performance, while a mark down towards the -120 end of the scale means you'll struggle to send a text.

If you prefer the numbers to the bars, you can keep hold of the indicator by holding down the power button in Field Mode until the turn phone off message appears. Tapping the home button now will make the switch permanent.