I have a 3 months Osmo and used it a few times when I went to call, it just does not turn on, all the batteries charged.

Hi Douglas, sorry for the problem you are experiencing.
It seems that the communication between the battery and the handle is abnormal, please try to wipe the copper sheet inside the battery compartment with 95% alcohol and cotton swab. If it does not work, wipe the battery contact with alcohol and cotton swab.  
Please let me know if it works, thank you.

HI, the Osmo worked perfectly after cleaning, thank you!

Douglas D`Almad Posted at 2018-1-2 04:43
HI, the Osmo worked perfectly after cleaning, thank you!

You are welcome, glad to know it work.
Have a nice day.