Help 2 Bricked phones, can anyone save them?

[Willster419]

One is in the QPST Download mode, but won't flash, complains of a "cookie error"
the other is in a bootloop, but the casio eMMC drivers show up for about 10 seconds before going away.

 

[thaihoangduylinh]

One is in the QPST Download mode, but won't flash, complains of a "cookie error"
the other is in a bootloop, but the casio eMMC drivers show up for about 10 seconds before going away.

Hi willster419, Have you unbricked your devices? You can see here : https://forum.xda-developers.com/android/help/unbrick-casio-gzone-commando-c811-t3396159 . I asked the question in that link and TheDrive help me fix it.