I want to update the radio

Hello
I have a radio for Android 4.2.2
And I want to update the radio
Radio specifications

cpu : cortex a9 dual core
ram : 1 gb
ver : 4.2.2
mcu ver : 4.3.8-11-10-450101

system ver : 2.7.39

dvd ver :: 2.13.13.1 -860mc

please help me

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