Bg95 M3 reboot when it try attach to the network

Hi! I designed a BG96 M3 Custom Board (following the instrucción from hardware design datasheet). When I send it an AT+COPS=0,2,“334020”,0 the BG96 reboot it self.

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cops=0 is the automatic network selection mode. If you want to manually configure the network, use cops=1

OK. I changed the command, but the module continues with the same