TX8 android box / very bad power plug 5V 2A DC

This box is new on market (+- six months?) and come with 2GB / 32GB and android 6 / wifi ac Bluetooth etc.

When I receive it, the box reboot alone sometimes 2/3 times a week sometimes 2 time in same day, for nothing in particular.

This is in WiFi. Its better when I plug my cable Internet but the box still reboot alone few times a week.

I read somewhere about power supply that supposed to handle 5V 2A but this dont ! I ordered on amazon a genuine 5V 3A (true 3A) and at this time I do not have any reboot since I use it (10 days).

I dont like the loader and there is no any loader for this box. I’m looking for some android rom (not android tv loader) but unsuccessfully

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