UMI TouchX, 2 month old, went death

GTEKES

\n\nEu desliguei meu celular Touch X com cerca de 60% de carga. Agora não quer mais ligar, nem dar sinal de vida, nem aparece a tela do carregamento ao liga-lo num carregador.
O celular desligou ontem antes duas evezes sozinho fazendo reboot.
O celular parece 100% morto.
Já fiz a demagnetização (20 minutos em folia de aluminio)

Alguem poderia me dar uma dica como proceder?
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I turned off my cellphone with +-60% charge.
When I triwed to turn it back on after +- 5hrs, the celphone was dead. No charging image when plugging in a charger.
Windows recognize, I plugged in something, but won't recognize, it's a cellphone
Power on, pressed for up to 30seconds won't work.  
The cell seams 100% dead.

Could anybody help please? With my former cellphones, I would have taken out the battery. The TouchX has a colsed design.  >>  No access to the battery.

Sincerely
Gerhard