User's Manual

144
MHz) and PCS (1900 MHz) networks - The phon
e
automatically uses the network with the stronges
t
signal and even switches networks during a cal
l
within the same operator’s network.
GSM
(Global System for Mobile Communication)
International standard for cellular communication,
guaranteeing compatibility between the variou
s
network operators - GSM covers most Europea
n
countries and many other parts of the world.
Phone Password
Security code used to unlock the phone when yo
u
have selected the option to lock it automatically eac
h
time it switches on.
PIN (Personal Identification Number)
Security code protects the phone agains
t
unauthorized use. The service provider supplies th
e
PIN with the SIM card. The PIN may be a four t
o
eight-digit number and can be changeable, a
s
required.
PUK (PIN Unblocking key)
Security code used to unlock the phone when yo
u
have entered an incorrect PIN three times i
n
succession. The service provider supplies the eight
-
digit number with the SIM card. If you input incorrec
t
PUK 10 times, the SIM card will be blocked and wil
l
not be able to use the SIM.