A friend of mine just received his brand new P3. He made a mistake installing the older Phantom 3 Professional Firmware v1.2.6. He flew the P3 twice but now the app shows the "upgrade your aircraft" . I am familiar with phantoms so I know how to update the Phantom 3 Professional Firmware v1.3.20. Format sd (FAT32-exFAT) /drag .bin file/insert sd into P3/turn it on/ then nothing happened. He open the TXT file and says identical firmware blablabla ABORT. He have tried it 3 times and it does nothing. Any idea ????