Nokia N72 OS reinstallation

SOURCE: CA-42 cable connection via nokia PC Suite

Yes
I have experienced this problem. What you need to do is plug the usb cable into the computer before switching the computer. Make sure you don't plug the other end into the mobile phone yet.
Once the machine boots up. If you've installed nokia pc suite. It an icon will appear in the taskbar. Click on it can't remember whether its right or left click, but you need to select manage connections. Now if you are using a genuine nokia data cable you shouldn't have problems but if it isn't then you need to uncheck the usb options and check the option called 'serial'. Once you've done this a button called properties or settings or configure which is greyed out should become active. Then from the drop down box you will have various options eg. com1, com2, com3. What normally happens is when you don't have the cable plugged into the usb port only com1 will be displayed. But when the usb cable is plugged in com 3 or com 4 will appear. So you select com 3 or com 4, then OK. Wait for a few seconds then connect you other end of the usb cable to your mobile and it should recognise it after a few seconds.

SOURCE: formsttong n72

I want to reinstall the operating system after formatting

SOURCE: Reinstalling the os For N72

first you try *#7370# if it is still not installing then turn off ur phone then hold *3 and call button and switch on ur phone hold on till it appears formatting. if it works enjoy, but it fail fails fon't scold me.

SOURCE: formsttong n72

There r two ways to format ur Cell Phone1. Soft Core Format
2. Hard Core Format

1. In Soft Core Format u have to dial *#7370# or dial *#7780# this will format ur phone memory and u have to manually format ur memory card

2. In Hard Core Format ur mobile gets formatted as a tough format, u have to keep on pressing the three buttons simultaneously(at the same time) for a long period unless u get a screen on ur phone when it asks for the region(ur country).

what u have to do: 
1. switch OFF ur mobile
2. u have to press three keys at a time
  Call Button (green key) + * key + 3 at the same time
3. now dont get ur fingers off those buttons , ask someone to switch ur mobile ON (if possible make ur cell phone placed on some table for stability) (please dont move ur fingers off those three keys unless u get the screen where u r asked for ur region)

once u got that screen ur cell phone is formatted

Doing HARD CORE FORMAT might help u in resetting the password.

NOTE: Formatting the phone with HARD CORE FORMAT METHOD may be harmful if not done in the correct way

Pls Vote for me if this solution works for u

Thank You

Vinay Ramani
India

SOURCE: nokia modem software

leave nokia for telstra !!!!!
seems to be the only way !