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I have an old windows phone (640 XL Lumia). I have not used it for a year, but I want to reuse it (for WIFI only).

When I start it, it shows after some time the date and time... when I press the button on the right, I see a blue windows screen, but it never starts up fully.

I removed the battery (and inserted it), I removed the (old) SIM card, also there's no SD card inside.

Is there a way to start this phone? Can I reset it? Or is it garbage now?

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