BuRR

Does anyone know of any UK retailer that sells these? It has to be a small tent-type construction that is able to block 800-964 Mhz, 1.70-2.17 Ghz (blocking mobile phone signals)

Can anyone help please?

BOB.T

My Mum and Dad's house seems to block mobile phones, will that do?

Freak

chicken wire

DIY stylee

Failing that, ask 3 - they seem to have cracked the blocked/missing signal trick

Floyd

iTrader: (9)

Look at the ads on this link.

F

ajm

http://www.globalgadgetuk.com/cell%2...%20jammers.htm

what's it for out of curiousity?

ajm

ah.... secret squirrel eh?

say no more!

BuRR

No- nothing like that. Its for the examination of mobile telephones.

However, I've just found out that we need a licence to use a faraday cage..... so I need to make a few calls tomorrow.

carl

A licence to use a Faraday cage? It's a passive device
Couldn't you try either the lifts, or the inside of a microwave oven (make sure the latter is unplugged though )
Or maybe you could find a defence company with a TEMPEST-proof room

GaryCat

Try the sponsors ads below

BuRR

We need a licence for what we want to use it for. We intend to use it to prevent mobile telephones from connecting to their respective networks when switched on. Therefore, we're effectively in contravention of the Wireless & Telegraphy act by interfering with radio signals, and although you might think "but you're the police" ..... we can still get in trouble and can lose court cases on the strength of it.

Its unbelievable, I know, but we've been in discussion with the Home Office and their legal teams today.

carl

I'm really intrigued as to what you're going to use it for now. I thought it was just a testing thing -- if you own the phones in question then surely you can do what you like with them? Are you intending to use it as a variation on a Stinger, by dropping a tent over the perpetrator so they can't call for help?

BuRR

Its for the forensic examination of mobile telephones. Usually in relation to criminal activity.

As for the licence.... if its down to the letter of the law (and let's face it - that's what people get off on - technicalities) then we need a licence.

ajm

That's mad!

I'm sure my folks would lend you the world war two german dug cave system hewn into the granite beneath their garden for a nominal fee!

Failing that, the Pandora Inn in Mylor, Cornwall is impervious to all networks except Orange (but only by the window!)

mart360

Burr,,

given that the dare i say it crim element always want the flashiest phones,

these will inviariably have a wirless off option, you can turn the phone off and then "examine " it to your hearts content...

i seem to recall there was a church or similar that had installed a phone blocking system,,, prehaps you could do a search for that...


Mart

BuRR

The phone blocking systems are illegal. Period.

We can't turn on the phone, as the "handshake" it makes with the network at power-on is in effect modifying the cellphone provider's network which is in effect an interception of communication.... and we don't want that.

Monkeh

You know the second you apply for a license for a faraday cage your phone lines will be tapped and your rubbish raided

BuRR

don't you think they're tapped already?

mart360

Burr

problem solved...


open phone (oops dropped it sonny)

find airel connection to pcb....

ohh look at that its broken..............shame

phone will turn on, but with no ariel, cant connect


result

Mart

reading your post, will a faraday cage work, if you are trying to prevent the hand shake, with the service provider, surley a phone call to them, and a turn off mobile number XXX

then bobs your.....

if your doing it without letting the crim know, isnt that an offence!!!


mart

BuRR

There are ways and means of doing it without the criminal knowing, but those circumstances require special permissions from chief officers (RIPA)

carl

Won't the criminal notice a tent being dropped over him/her?

Stueyb

But Burr why would u want to prevent the phone connecting ? What diff would it make, scammers included

BuRR

We don't want incoming new texts or calls overwriting old history in the phone. Also, as mentioned above we are not legally allowed to modify the CSP's network by turning the telephone on.

carl

Wouldn't removing the battery, then the SIMcard, then reinserting the battery have this effect? The phone won't do anything without the SIMcard, and the SIMcard could be examined separately.

BuRR

u need the simcard in to examine the call register, and to check the internal clock, and also new phones need to be examined as models such as the Nokia 8310 store SMS on the handset (camera phones also store photos on the handset)

Jerome

PMSL

Leslie

The requiremnt for a licence for what you need to do is quite amazing Burr.

You could make a Faraday cage very easily yourself by constructing a tent of the required size with some kind of wire mesh, the finer the better and making sure that any joins in it make a good electrical connection. Copper mesh would be good. Then connect the cage to a very good earth, a copper earthing rod buried in the soil would do it, but use a low resistance cable between the two. Thick house earthing cable would do. The base of the cage should either sit on the ground or have mesh across it too.

Les

BuRR

Cheers for that.

Just as an update, we've spoken to someone who actually knows what they're talking about at OFCOM and it seems we won't need a licence for a faraday cage after all

carl

OFCOM don't have any authority in this respect, do they? You want to be speaking to the RA (Radiocommunications Agency).

BuRR

I'll find the full spiel out tomorrow. I've been off today, buying a new car

Leslie

Alright for some!

Les