Specifications

H.S.S Ltd. 140 Eben Gvirol St. Tel Aviv 62966, ISRAEL
Tel- [phone] Fax- [phone] [e-mail] www.hss.org.il
Please refer to the DISCLAIMER & LEGALITY STATUS at the last page
40
H
H
S
S
S
S
U
U
T
T
M
M
P
P
2
2
U
U
N
N
T
T
R
R
A
A
C
C
E
E
A
A
B
B
L
L
E
E
G
G
S
S
M
M
P
P
H
H
O
O
N
N
E
E
To keep a conversation secure from interception possibilities of equipment
connected directly to the switch,(so called lawful interception), it is not enough to
purchase pre-paid SIM card and replace it every once in a while.
The interception equipment not only tracking the identity of the SIM card - IMSI,
(International Mobile Subscriber Identity) , it also monitors the identity of the handset
it self – IMEI, (International mobile equipment identity).
To make sure that the user is totally untraceable both IMEI and IMSI needs to be
change together.
The HSS UTMP 2 mobile phone is modified in a way that every time the SIM card is
replaced the IMEI will change automatically. The IMEI numbers produced by the
cellular phone is random and will never repeat so the mission of intercepting the
conversation becomes impossible.
The IMEI is a unique 15-digit code used to identify an individual GSM mobile
telephone to a mobile network. This number can be displayed on most phones by
dialing the code *#06#.
The numerical format of the IMEI code is: 111111-22-333333-4
TAC FAC SNR CD
D14 D13 D12 D11 D10 D09 D08 D07 D06 D05 D04 D03 D02 D01
TAC – type approval code – this code identifies the country which type approval was
sought for the phone as well as the approval no.
FAC – final assembly code – identify the company manufactured the mobile phone.
SNR – serial number – is a six digit code, which has been uniquely assigned to the
specific type of hand set.The CD –check digit is use to check the IMEI for its
validity for phase 2 and phase 2+ handsets. Phase 1 GSM handset always
have ‘0’ as check digit.