Unable to find your mesh devices

Error : Unable to find your mesh device. Make sure the mesh device’s LED is blinking blue and that it’s not connected to any other devices.

I have already flashed:
argon-system-part1@1.2.1.bin
argon-tinker@1.2.1.bin
argon-ncp-firmware-0.0.5-ota.bin

but still no luck pairing and claim my Particle Argon, request for help!!
Particle app is already in latest version

I would suggest that you use the latest Device OS 1.4.4 and that you flash:
system-part1
bootloader
softdevice
then tinker

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