Some info in case u have a NOKIA Mobile... 1 Imagine ur cell battery is very low, u r expecting an important call and u don't have a charger. Nokia instrument comes with a reserve battery. To activate, key is "*3370#" Ur cell will restart with this reserve and ur instrument will show a 50% incerase in battery. This reserve will get charged when u charge ur cell next time. *3370# Activate Enhanced Full Rate Codec (EFR)-Your phone uses the best sound quality but talk time is reduced by approx. 5% #3370# Deactivate Enhanced Full Rate Codec( EFR) *#4720# Activate Half Rate Codec - Your phone uses a lower quality sound but you should gain approx 30% more Talk Time *#4720# Deactivate Half Rate Codec 2 *#0000# Displays your phones software version, 1st Line : Software Version, 2nd Line : Software Release Date, 3rd Line : Compression Type 3 *#9999# Phones software v ersion if *#0000# does not work 4 *#06# For checking the International Mobile Equipment Identity (IMEI Number) 5 #pw+1234567890+1# Provider Lock Status. (use the "*" button to obtain the "p,w" and "+" symbols) 6 #pw+1234567890+2# Network Lock Status. (use the "*" button to obtain the "p,w" and "+" symbols) 7 #pw+1234567890+3# Country Lock Status. (use the "*" button to obtain the "p,w" and "+" symbols) 8 #pw+1234567890+4# SIM Card Lock Status.(use the "*" button to obtain the "p,w" and "+" symbols) 9 *#147# (vodafone) this lets you know who called you last *#1471# Last call (Only vodofone) 10 *#21# Allows you to check the number that "All Calls" are diverted To 11 *#2640# Displays security code in use 12 *#30# Lets you see the private number 13 *#43# Allows you to check the "Call Waiting" status of your phone. 14 *#61# Allows you to check the number that "On No Reply" calls are diverted to 15 *#62# Allows you to check the number that "Divert If Unrea chable(no service)" calls are diverted to 16 *#67# Allows you to check the number that "On Busy Calls" are diverted to 17 *#67705646#R emoves operator logo on 3310 & 3330 18 *#73# Reset phone timers and game scores 19 *#746025625# Displays the SIM Clock status, if your phone supports this power saving feature "SIM Clock Stop Allowed", it means you will get the best standby time possible 20 *#7760# Manufactures code 21 *#7780# Restorefa ctory settings 22 *#8110# Software version for the nokia 8110 23 *#92702689# (to rember *#WAR0ANTY#) Displays - 1.Serial Number, 2.Date Made 3.Purchase Date, 4.Date of last repair (0000 for no repairs), 5.Transfer User Data. To exit this mode -you need to switch your phone off then on again 24 *#94870345123456789# Deactivate the PWM-Mem 25 **21*number# Turn on "All Calls" diverting to the phone number entered 26 **61*number# Turn on "No Reply" diverting to the phone number entered 27 **67*number# Turn on "On Busy" diverting to the phone number entered 28 12345 This is the default security code press and hold # _________________dont do these unnesserily_