I try it but i have always
Suitable USB interface (phonet) not found, waiting...

some times i have :

Suitable USB interface (bootloader/phonet) not found, waiting...
Found device RM-696, hardware revision 1603
NOLO version 2.3.6
Version of 'sw-release': DFL61_HARMATTAN_40.2012.21-3_PR_005
Sending ape-algo image (7096 kB)...
100% (7096 of 7096 kB, avg. 10607 kB/s)
Suitable USB interface (phonet) not found, waiting...

Sometimes i have a white LED or a vibration

An idea ?
Flat battery ?