nokia has base firmwares with pr legacy 001

These firmwares are then modified to include support for MEA region and given legacy code 005

China is IIRC pr legacy 006

Hereon the firmwares are given to telcos to add their modifications...Regardless of any mods added the legacy codes are bumped up to 2XX-3XX


You are using a firmware that is pr legacy 339...It allows you to do whatever you can do in 001 firmware except it may have some additions from the Telco...