*#06# for checking the IMEI (International Mobile Equipment Identity)Information you get from the IMEI:
XXXXXX XX XXXXXX X
TAC FAC SNR SP
TAC = Type approval code
FAC = Final assembly code
SNR = Serial number
SP = Spare
*#0000# To view Software Version.
#746025625# [*#sim0clock#]
Checks if the sim clock can be stopped. Sim clock stop is a kind of stand-by mode
which will save battery time. This code doesn't work with software version 4.59.
*#92702689# [*#war0anty#] takes you to a secret menu with 6 choices:
1. Displays Serial Number.
2. Displays the Month and Year of Manufacture (0997)
3. Displays (if there) the date where the phone was purchased (MMYY)
4. Displays the date of the last repairment - if found (0000)
5. makes you capebel of transferring user data if you have the gear for it
6. shows how many hours the phone has been on
Latest software version: V 5.02 NSE-8/9
*#3370# - Enhanced Full Rate Codec (EFR) activation. It will automatically restart.
*#3370* - Enhanced Full Rate Codec (EFR) deactivation. It will automatically
restart.
*#4720# - Half Rate Codec activation. It will automatically restart
*#4720* - Half Rate Codec deactivation. It will automatically restart
Enhanced Full Rate will give you much better sound quality when you enable it. The
new Enhanced Full Rate CODEC adopted by GSM uses the ASELP (Algebraic
Code Excitation Linear Prediction) compression technology. This technology allows
for much great voice quality in the same number of bits as the older Full Rate
CODEC. The older technology was called LPC-RPE (Linear Prediction Coding with
Regular Pulse Excitation). Both operate at 13 kilobits.(but you take up more space
on the network, so they can charge you more) - Talk-time is reduced by about 5%
when using the ERF option.