IMEI validity - advanced question...

[GeeZuZz]

Hi!

I got a "mission" for a man who needed to proof for the police that two phones could have the same IMEI. He wanted me to change IMEI on a phone, to a IMEI he had on some papers.

The problem was that the IMEI he had on his papers, seemed to be invalid. It ended with a zero, but the applications calculated the last number to "1".

Is it 100% sure that the IMEI ending on 0 was invalid? The IMEI was from a old Nokia 1610(?) - maybe those model had its own IMEI generation system?

[mestrini]

I think that most of old DCT2 had their IMEI ending in 0 .
I have myself two 3110 in that situation but every Nok tool calculates the last digit as an '8'.

I think in those times that digit wasn't a control number as today but let the experts have their word
the question now is why when typing *#06# we get 15 digits with the last one being a '0' and phone registering correctly but if we were to write it to a new phone the last digit could be a different number, but phone still registering :-?

[sander18]

maybe you should read full flash from phone and edit the file in hex and then write it to phone...

[GeeZuZz]

mestrini: Ok, so then it's not unlikely that the old models did not have this control number, or had an other way to calculate it.

sander18: I guess i could have done that, but it's too late now... :(

Thanks for the replies!