the ones that i remember for nokia:

*#0000# - that one i think is to check the version

and the one i like to use to restart my old nokia 8210 is

#3370# i prefer entering a code-feels more cool although in essence the code is to turn of the efr or hr..tak ingat which

112 is to connect to emergency numbers..it supposed to be able to dial even when ur phone out of coverage as it is the emergency number..

if u dont wanna use the #3370#, u cld also use the #4720#..but not sure if can use on newer phones...

theres this other code..heard of it a long time ago but i have no idea what it does

*#746025625#

if done correctly, it will display sim clock stopped allowed..or something to that effect

oh only for nokia btw..it seems that nokia has a lot of codes..

an educated guess wld say that the time format wld be

days:hours:minutes:seconds

if only three then it shld be

days:hours:minutes

if only two then

days:hours

this is just a random guess although i think thats highly possible..correct me if im wrong...

usually given by ur sp.

iirc, for maxis its 1234. or not. its used to unlock the more "secure" functions.

This was posted already, but I believe this should be put into the first post. Coz it could save a lot of ppl time, hassle and money

Nokia security code generator

It actually works for my 5210