is it possible to use the phone without a sim card or change the frequency at which the mobile communicates.. actually what i want to do is use a couple of cell phones or more to communicate between each other over a short range without using any service provider, i am ready to buy/make a kit which can work as a kinda service provider between those two or more mobiles in a certain region.. say of radius 300-500m......
on more larger scale.. i want to set up a kind of inter-com system using cell phones which people already have.. as of now.. the cell phones models are not important.. i just want to tweak them for my purpose
any suggestions, links or books will be very very helpful......
thanks
Comments
: frequency at which the mobile communicates.. actually what i want to
: do is use a couple of cell phones or more to communicate between
: each other over a short range without using any service provider, i
: am ready to buy/make a kit which can work as a kinda service
: provider between those two or more mobiles in a certain region.. say
: of radius 300-500m......
:
: on more larger scale.. i want to set up a kind of inter-com system
: using cell phones which people already have.. as of now.. the cell
: phones models are not important.. i just want to tweak them for my
: purpose
:
:
: any suggestions, links or books will be very very helpful......
:
: thanks
:
It might be possible, but that would involve breaking and rebuilding the phone processor. Practically it is not possible, because nearly all the electronics are embedded into ic's.