After years with Samsung phones (the last one held two years before the touch screen fails, causing me to lose in passing a number of contacts), I spent this time at Sony. With no mobile subscription with renewal, I was looking for a smartphone "not too expensive" (so to speak), and a 4 "screen (to be able to hold in my pocket handbag without problems) and android ., no need to 4G Xperia M seemed to suit my needs After one week of use, no complaints. internal memory of 4GB largely sufficient for some applications I need, internet connection 3G seems to me fast and fluid, Bluetooth impeccable. The audio quality is up to Sony's reputation. The camera is not as good as the high-end phones, but I expected (not matching colors . not exactly to reality) I installed sony software for Mac (Bridge): nothing fancy, but useful for synchronization. Only problem: I had a hard time opening it to insert the battery, SIM card and a microSD card purchased additionally. It took a lot of patience and a great meticulousness (and, I admit, a small screwdriver).