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Nokia 6600 Formatting Code and other codes First : Back up your contacts before doing any thing for its going to be lost after formatting: Some problems for which you need to format: 1. Blank screen phone unable to reboot. 2. Phone only able to boot-up to "Nokia" word screen. 3. Install some program but not able to uninstall it after that. 4. Unable to delete unwanted files on C drive. Do a Full phone formatting on your 6600! as steps below, 1. Make sure you have at least 3/4 charge of battery power left. 2. Backup your contacts list and personal files to MMC memory card. 3. Switch-off your 6600 phone. 4. Press and hold * keys; 3 dial key, green key (call / send) , and then press the power on/off to swtich on the 6600 phone. Remember, do not let go the 3 press and hold keys until you see a formatting word screen show! 5. After a few minutes when the Full phone formatting completed, your 6600 will back to original system and factory settting. Bye and enjoy! And also the old commands work... Normal reset *#7780# 3rd party apps remains Deep Reset *#7370# removes everything
9210/9210i Remove the sim, memory card, battery. so it means, the phone is off. now, put the battery back. wait for the start up image to come out ( nokia hands ) then press buttons: control, shift, F then wait until finish.... Nokia N-Gage To view Week and Year of manufacture enter *#3283# [*# D A T E #] The last two digits are the year. If the year is 95, the first two digits are the month. For 96 the first two digits are the week of the year. To view the software version on Nokia N-Gage enter *#170602112302# or *#9999# On newer phones, the code has been changed to *#682371158412125# Formatting use *#7370# Nokia E50 format i try allso * + 3 + green button + power Nokia N70 *#7780# use this code for or * + 3 + green button + power Nokia 9500 and 9300 Please try Ctrl+Chr+F  ( Remove and put battery after appear Nokia press above command) Back to default user code of Nokia phone *#7370#  > 12345 Nokia 7700 and 7710 In case of serious problems with your Nokia 7700/7710 (if e.g. your phone doesn't start or it is very unstable) use the following method to reformat the device. Please, be aware that this function brings your phone back to a factory state, i.e. it removes all applications, files and data. 1 Disconnect the charger and remove the battery. 2 Wait for about ten seconds and insert the battery to start the device. 3 When you see the NOKIA welcome screen, immediately press and hold two lower keys on the left side (the [= key and the Menu key) and shortly after that press and hold the second key from the top on the right side on the phone. Confirm that you want to format. Formatting will start.