Try to format using three finger method
follow this step
Turns off the phone
Press simultaneously on the green/talk, 3 and* keys and hold the 3 keys.
Turn on your phone
Wait for the onscreen Format message then can release the three keys
This method may also work for Nokia phones that won't turn on.
Note that before making a reset on Nokia's latest phone
using the *#7370# or the 3 finger method, better make a backup, as you will automatically delete important data:
The license for pre-loaded contents (music, video, maps,etc..)
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