Since two weeks I own this phone I have not yet found him lacking. Just occasionally it does not find network. A Micro Sd Card 32gio works perfectly, 4G is really impressive, the internet is faster than me lol. Training ends well, I find myself having on hand only for the pleasure of touch, the screen is stunning and the photos are simply the most beautiful I've snuff. The Overlay is not invasive, and we made it very intuitive, many options are fast becoming indispensable. Positive: high quality manufacturing, front camera photos, screen. Negative: For sure having behind glass makes the phone very fragile, I think it is better not to drop it, under penalty of ending up with a broken screen phone front and back. RAS Otherwise I am really satisfied and recommend it.