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It is known that every electronic device has some hidden functions used by programmers or service providers, which can be very useful for phone owners.

In the same way it happens with the iPhone, the Apple mobile device, which with some codes that must be typed from the call option, give access to some very curious functions.

The codes are entered in the phone application in the same way as if a number was dialed to make a call.

# 1 Block the caller ID:

This is a quick trick for those who must call someone who is not an acquaintance, or who does not want to keep the phone number of the one who is called.

For this, you should only enter # 31 # before the phone number you should call. This "hack" only works if the recipient does not have the number registered among their contacts.

# 2 Status and query of the signal strength:

It does not happen to all that the phone shows a certain amount of signal bars, but it does not work at all to make a call or send a message, either text or online.

This can be consulted by dialing this code: 3001 # 12345 # . With this code, you can keep the visible signal indicator while using the device in the normal way.

To do this, press and hold the power button and, when the phone asks you to swipe to turn off, press the start button.

# 3 Check the IMEI of the phone:

Every cell phone has a unique identification number, which serves to differentiate it from all others.

This unique serial number worldwide can be found quickly and easily, the user should only press * # 06 #.

# 4 Activate waiting calls:

This allows call waiting to be activated and deactivated in a simple way, it can be useful for working moments in which multiple telephone calls are received that you need to attend.

To activate calls on hold, type * 43 #, to deactivate them, type # 43 #, and to know the status of calls waiting on your cell phone, you should only dial * # 43 #.

# Follow me: @Mike26