The software loaded into the EEMPROM is divided into different parts as
1. MCU
2. PPM
3. PMM
4. WUG
MCU: Master Control Unit Software
This software is the main operating system of the phone. All the functions and menus are controlled by this software. All the symptoms mentioned above are due to the defects arising in this area.
PPM: Post Programmable Memory
In Nokia phones language packs are stored in this area. By flashing this area we can update the phone with a designed set of phone languages.
PMM: Permanent Memory
This area of memory is stored with permanent information of the phone. This area called also be called as Product Profile Area.
WUG: Wake Up Graphics
This area of memory certain the power on Graphics details of the phone.
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