Blocking list        *#3333*#
Time connected   *#2558*#
Flags,something  *#3377*#
Security code      *#7489*#

Secrets codes for Philips FIZZ phones:

IMEI code *#06#
SW info *#8377*#
Security code *#1234*#

Secrets codes for Philips SPARK phones:

IMEI: *#06#

Secrets codes for Philips GENIE phones:

*#06#      IMEI number (International Mobile Equipment Identity)
*#2254*# Status register: C, BS, RR, MMI, CREAT.
*#2255*# activate and deactivate the "DEBUG CALL"-Mode; when activated,
make a call to a busy line an the phone will disp some hex-codes on the disp.
*#2558*# the time in days,hours and minutes you are connected to the net
*#2562*# not clear; the phone reconnects to the net
*#2565*# not clear; warmstart ?
*#3333*# (NO) BLOCKING - list (15 items)
*#2377*# "BEER": not clear, the phone waits a random time and reconnects
to the net, sometimes the phone makes a reset or something
*#3377*# Init, Flags, SIM LCK
*#3353*# resets the (NO) BLOCKING - list
*#7378*# Name, Length, SIM phase
*#7489*# SECURITY CODE
*#7693*# you can activate and deactivate the SLEEP MODE
(when deactivated the battery will go down!)
*#7787*# not clear: SPURIOUS INTERRUPT
*#7948*# SWITCH OFF: not clear; it is a timer or something
*#8463*# Some information about the SLEEP MODE: Wake, Sleep Req., Sleep

Philips Genie (TCD838)
Type *#2337*# and it will be activate the beep signal when the cellphone reconnected to the net.

Unlock info for Philips Savvy:

You should change address c0: so the value on it will be one smaller (eg. 85 should be 84 etc.), and also address DE:, to value of 00. After that the phone should be unlocked.

Software update, how?

I have been asked a lot about how to update the software in Nokia 3110.
The easiest thing to do is to go to the nearest Nokia
dealer and make him do it for you. Just remember that it is supposed to
be free (a receipt is requiet) so don't let him tell you anything else!

The Service provider (SP) lock is used to lock the cell phone to the
SP's SIM card. Once the cell phone is locked to a specific operator, if one
inserts a SIM card from a different operator the phone will refuse to accept it!
The cell phone will however accept another SIM card from the same operator.