Its required restricted codes - Nokia 7230 Cell Phone

*#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#]
You don't need the warranty-codes any more - you can just scroll through the information like in any other menu. It has the same data as 81xx and 31xx phones (with "Edit" button for purchase date, and "User data transfer").

Menu:
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) you can here set the Purchasing Date (Warning: You can only do this once - so be careful what you write...)
4: Displays the date of the last repair - if found (0000)