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* Put the SD card into your Cosmo Communicator and boot into TWRP. Your SD content should be available in folder /auto0-1.
* Tap on "Advanced" and then "Terminal" to open the terminal application
* Finally, type the following commands (use using the on-screen keyboard as the keyboard layout will differ from your one):
<code>cd /auto0-1/cosmo-customos-installer</code>
This should restore your Andriod firmware on your Cosmo Communicator.
If you can't boot into either Recovery mode or TWRP then you will most likely have to send the device to us for repair.