GSM signal blocker

[zloy_qwer]

Dear experts, do some one use tool like this? :
I think, that this tool can be used in drive test if you want to get bad result )).
(change xx to tt)
hxxp://www.dealextreme.com/details.dx/sku.28713~r.17203139

[crisnspro]

Dear experts, do some one use tool like this? :
I think, that this tool can be used in drive test if you want to get bad result )).
(change xx to tt)
hxxp://www.dealextreme.com/details.dx/sku.28713~r.17203139

if you want to get worst result, using a metal box, put your test terminal over there is OK, no need jammer.