Upgrading ZTE Open C to Firefox OS 2.2?

Hi,
On the official upgrade instructions on the dev wiki, it's fairly simple to upgrade to FXOS 2.1. However, because the build system is now based on Android KitKat, I can't install the latest images on my phone, as it just bricks it and I need to wipe it and start again. Is there any way to upgrade, or am I stuck?
Also, what's the difference between "flame" and "flame-eng"?
Thanks.

Hi megaminxwin,
Currently the ZTE Open C does not have that version available and may brick the device if you flash another build onto the Zte Open C device. However to recover the os it is possible to flash again. Please see the instructions on this page: [https://developer.mozilla.org/en-US/Firefox_OS/Developer_phone_guide/ZTE_OPEN_C]
If you have any other questions we are happy to help.

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    Hi Ralph,
    thanks a lot for the quick response. This is very appreciated! I will try to equally give you all the information required as quickly as possible.
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