g8tzl2004@yahoo.com declared for all the world to hear...
> I have a Nokia 6210 which is displaying "SIM error STOP". I have tried
> known good sim cards from all 4 networks. I have also run Eeprom Tools
> v4 and the 6210 is passing the various tests so I think the eeprom is
> not corrupt.
>
> I get the "SIM error STOP" message a few seconds after switch on -
> there is no other messages such as "Registering" etc.
>
> With no sim installed , I get the usual "Insert Sim" message.
>
> I have searched the net but not found any answers.
>
> Maybe the 6210 needs to be reflashed? Maybe its a hardware problem? I
> checked for obvious problems but nothing stands out. The internal
> backup battery was a bit corroded and was reading 1.7v. Maybe the
> corrosion indicates some water damage but the PCB looks clean. The LCD
> is missing a horizontal line at the top but I don't think this is the
> cause of the "SIM error STOP" message.
>
> Any thoughts?

Give up and get another one.
--
Regards
Jon