Hello Mamun,
To revert your Lumia 625 running Windows 8.1 with 8, we recommend that you download the Windows Device Recovery Tool using your PC and use it to install Windows 8 on your phone.
Let us know if this works for you.
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my lumiya nokiya 625 8.1 I WANT make windose 8 how
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* Original title: complane
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Answer accepted by question author
Hello Mamun,
To revert your Lumia 625 running Windows 8.1 with 8, we recommend that you download the Windows Device Recovery Tool using your PC and use it to install Windows 8 on your phone.
Let us know if this works for you.