Do all cell phone signals share the same wavelength? How does a cell phone receive an incoming call?

Question

Do all cell phone signals share the same wavelength? How does a cell phone receive an incoming call?

Answer 1

I'm going to explain this in very simple way.  The actual process is far more complex... (but I don't think you really want to know all the details)

There are several "bands" that cell phones use.  Different companies and different services use different band or range of frequencies.  For your purpose, frequency and wavelength is the same thing.

As you move about, your cell phone constantly checks into different cell phone towers.  At any given point, more than a few cell phone towers know you are in their area.  When someone calls your number, the call gets routed to these towers automatically.

At this point, those towers that have the strongest signal from your cell phone checking in will transmit a code.  Your cell phone recieves this code and transmits back "I'm here!"  Then the tower says "OK", "here's your call" then connects you to the caller.

To make simulateneous usage possible by many subscribers, within this "band", there are many channels.  Each channel can support multiple users by sharing.  But this is outside of discussion of how your call gets routed.

Some cell phones have a ICON on the display that comes on when your cell phone is active.  You might notice, every few minutes, this icon comes on.  This is the activity I am talking about.  Your cell phone says... "here I am..."  "send me a signal if you get a call"....  On the side note, it is possible to track where you are, if you are carrying a cell phone...

Answer 2

yes,all mobiles share the same wave length but its amplitude was modulated according to its coding number hence each mobile has seperate coding according to code matching you recieve the incoming calls...