Nowadays you can reprogram your Nokia phone at home. By flashing a new software version some bugs in the phone may be fixed. You may even customize the firmware by adding your own features and applications in your phone.
CAUTION: This tutorial applies only to Nokia's DCT-3 (Digital Cellular Telephone, generation 3) phones. DCT-3 phones have monochrome graphic display, usually of size of 84 x 48 pixels (larger sizes exists, too). The most well-known DCT-3 GSM phones are Nokia 5110, 6110, 6150, 7110, 8210, 3210, 3310, 3330, etc. The software and hardware required to reprogram other (newer) Nokia phones are different. Do not try to reprogram your color-display Nokia phone using these instructions.
The built-in software of Nokia phones is saved in a FLASH memory
FLASH memory can be erased and reprogrammed (usually at least 100000
times). To allow easy phone updates in the service centers, opening the
phone is not necessary to reprogram the FLASH memory. Using a special
"flasher" cable between a regular PC and the phone is enough.
CAUTION: Trying to modify the built-in firmware of a mobile phone may render it practically unrepairable. This applies especially to phones that do not have a separate EEPROM chip for settings and calibrations (e.g. most Nokia 3xxx phones). Before trying to update the flash memory, you need to understand the functions of your flashing program and the whole flashing process, including any checksum updates required. NuukiaWorld does not give any support in flashing-related questions.
No email support or answers to technical questions.