PEOPLE are only just realising that their iPhone has a "secret menu" that unlocks hidden features.
Under the bonnet of every Apple mobile device is a concealed menu that keeps details about your phone's network service which you can't find elsewhere.
You can uncover the hidden menu by opening the phone calling option.
Then type in a series of numbers and symbols into your phone as if you’re about to call a number.
From there, simply dial *3001#12345#* and hit the call button.
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Hit the call button and a special dashboard should appear, with bunch of technical info.
But the one you want to take a look at is called LTE RSRP, which stands for Reference Signal Received Power.
This is basically the true signal strength of your iPhone.
It usually goes from -140 to -40, and the closer you are to -40 the better.
This area is actually meant for engineers to get in-depth information about your smartphone's connection.
But there's no harm in having a nose around with this handy hack.
Although you probably won't be able to understand most of the other features which are meant for techy types.
The so-called Field Test Mode has been lurking around for years.
Android owners can find theirs by going to Settings > About phone > Status > SIM status > Signal Strength.
It comes as iPhone users were urged to check their devices as Apple prepares to delete photos after a major feature was killed.
Millions of iPhone owners urged to check 'hidden mode' that can keep you safe
Meanwhile, smartphone owners have been informed of certain settings that can drain their iPhone's battery life.
It can be very annoying when your iPhone's battery dies – especially when you're out.
And check out our iPhone storage guide that details three nifty tricks to free up some space so you can get snapping again in no time.
