The phone is clearly very sensitive to battery charging. The plug can be easily disconnected by tilting the connector. Furthermore even when it is connected, and shows "recharging", the phone will not charge 1 time 2. There needs to be a battery disconnection, wait a while. And reconnecting. Eventually he starts to properly load after several tries, but several hours have passed before he does what I ask him. it's unbearable.
The update is not possible; the procedure does not work on my Dell Latitude Windows 7-64bit.