A backup of your phone with the newer version of PC Suite.You need a suitable software like Nokia PC Suite to open an NBU file.
Always use the appropriate (and possibly the newest) firmware on your device.
What is also VERY IMPORTANT to have in mind is that by performing these steps below you will loose your device's warrenty.
And when I press *#0000# on my phone, I got: v 4.0632.0.38 RM-92 Nokia N80 (530.01) My phone is way outdated. Applications like Nokia Conversations, Shozu, Google Map, simply dissapears.
IMPORTANT * All your phone specific settings seems to get blown away by the firmware upgrade.
Updating to the newer version 5.50 of the Nokia 6300 firmware, however, solved this problem together with the following software updates: [ad code=1 align=left] Please follow the comments discussion to gain insights on the newest software releases for the Nokia 6300.