Among builders smartphones competition emerges with brands like ACER. - Entertaining + Amazon = delivery and guaranteed good point - Smartphone space saving both weight and size - Grrrrrosse battery (1500 mAh!) = Excellent battery - Dual SIM (operation of both very simple and easy) - OS Android 4.2.2 (Jelly Bean) - Screen sufficiently well defined and reacting very well - Memory capacity 4GB, easy to rise with a micro SD card slot up to 32GB - Dual core processor clocked at 1GHz - Bluetooth, wifi, etc ... EVERYTHING that found in Apple (iPhone) and Samsung very expensive for a questionable added value. I do not see ANYTHING that can be criticized for a "small" smartphone that has everything a "big" except ... THE PRICE !!! If THANK YOU.