THE iPhone is full of secrets – and some require special access codes to unlock them.
Under the bonnet of every device is a hidden feature, as revealed by TikToker markdx_.
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How do you find it, you may ask?
It’s pretty simple – just open the dial pad and type *3001#12345#*.
Hit the call button and suddenly a section of the iPhone not accessible through the usual settings will appear.
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.
Although you probably won’t be able to understand most of it, there are some useful parts.
For example, try to find a bit called LTE RSRP, which stands for Reference Signal Received Power.
This is basically the true signal strength of your iPhone.
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It usually goes from -140 to -40, and the closer you are to -40 the better.
This is actually the data that is used to work out what your signal bar shows.
But most of the other features are meant for techy types and aren’t much use to everyone else.
In fact, 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.
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This post first appeared on Thesun.co.uk
