I am trying but not working

Nokia S40 phones are typically already updated to the latest and last version of the operating system, some years ago.
The recovery tool does not provide any additional updates to the updates that came Over The Air years ago. It's intended as a 'firmware flash' tool in case the phone is malfunctioning.

Also please note, some S40 phone variants can have an additional local language and a local keyboard installed. There is a risk that such customized phones are recovered to a standard configuration when the tool is applied.

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Hans