Apple's phenomenal smartphone looks intimidating... and this is probably one truth about iPhone. The device looks stylishly simple but not all users know everything about it. In fact, even those who claim to be iPhone gurus may turn out to be less than beginners when it comes to unlocking hidden iPhone features.

It's no secret that iPhone has hidden features and although unlocking it may not contribute largely to anything, it will surely work its way in improving the user's experience through secret codes. To start with, it's important for the user to know what these secret codes are to help out with some situations such as finding out how much signal you've got. DigitalSpy shared how to find the accurate reading of the iPhone's network and that is to enter the iPhone secret codes *3001#12345#* and pressing call.

Users can also look for their IMEI number in case it is needed. According to MUO, IMEI is important as it is unique in every phone. It may not help with getting stolen iPhones back but, it can help in rendering the device useless. To get this, users just need to dial *#06# and wait for it to appear.

Another secret code helps in unlocking a hidden feature that involves activating the iPhone's Call Waiting feature. Entering *43# will notify the user that another call is coming aside from the current call. Meanwhile, dialing *#31# blocks the user's number for any outgoing calls. This is ideal for when iPhone users want their number hidden.

And finally, users have a way to ditch any unwanted calls by using iPhone secret codes. By dialing *#21#, any call can be directed to a voicemail and at the same time, avoid the guilt of being a snub. This is perfect in case the user has a busy day or simply doesn't want to be disturbed.