This smartphone has 16 GB internal memory?? which can be further upgraded with a microSD card?? this device is locked?? being sold exclusively for use with T-Mobile.</br>Bluetooth connection so you can transfer multimedia and chat with  friends all the time</br>Take brilliant photos with its 13 MP camera?? and make video calls with the 2 MP front camera; The Galaxy S4 is also equipped with WiFi and</br>The Samsung Galaxy S4 has fast 1.9 GHz speed?? quadcore processor?? so the multi