User's Manual

User's manual
44
Boot time,
the display
information
check the SIM card (SIM card inserted),
whether SIM card is installed correctly
phone lock password, set the phone lock,
phone password must be entered prior to
use;
enter the PIN, chose to enter the PIN ev
ery time you turn, you must enter the PI
N code;
PUK code: the connection three times t
o enter the wrong PIN code will lock the
SIM card, you should enter the network
operators to provide the PUK code;
Poor call
quality
Check to see if volume adjustment
inappropriate
use of mobile phones in poor reception
areas, such as high-rise near or baseme
nt, radio waves can not be effectively co
mmunicated;
use of mobile phones in the call-intensive
period, the above working hours, line co
ngestion caused not call;