Do Cell Phone SP’s ping you phone to see if you are on line or not?
Is so why is it necessary?
The SP is I assume service provider?
It depends on what you mean as ping.
In general the network needs to know what cell you are in. In the systems I have worked with the phone when powered on will contact the cell site to let the network know where it is. After that every so often (1/4 second to 10 seceonds) it will turn on and listen to the network to see if there is a call for it.
It is the job of the phone to turn on the radio to see if there are calls. I am not sure if you would call that a ping I suspect not but I could argue it either way.
I’m mostly familiar with CDMA networks (Sprint and Verizon) and the base stations are contantly broadcasting to all of the cell phones in their cell and on their network. Every so often the phone sends a message to tell the network where it is so the network knows where to route an incoming call as well as some other information about signal strength and such.
GSM and TDMA phones (all the other companies) do the exact same thing, but the other information sent by the phone is slightly different because of the different architecture.
Are they burning you dog too?