Hi,
Thanks for the reply. God bless, we've found the issue it was from the crystal and its capacitors. we've replaced it along with its caps and its working now. Thanks.

Hi Sorry for pumping this thread. But unfortunately we are facing the same behavior, everything works correctly, even UART/Serial but when canning wifi shows zero APs. We are using 40mhz crystal. We've reflowed the PCBs also. Moreover this is not the case for all our production, only few of them, sh...