I just got home from a holiday in Switzerland. I try to connect my Samsung Galaxy Android via USB, and the phone refuses to notice it's USB-connected to the computer. I try turning the mobile off, and nothing happens. Later on, I try connecting it to the charger: same result, nothing happens. Which means that, to charge it, I must swap batteries with another phone, charge the battery in that one, and swap batteries again. How do I fix this problem? Any ideas?