Second brand smartphone for me. I needed the dual SIM. It was attractive ... Then ... worries of storage, enough space. Yet I have a very measured number of applications on smartphone. The rest I use on tablet. I thought that after an update, it had to repartition the space, it can happen, it's not pleasant, but either. Thus, an upgrade followed by a factory reset later, same concern, and 4 GB of storage advertised turn out to be less than 1 GB ... see screenshot. Having changed jobs, the dual SIM is more necessary to me, I'll turn around lover in the arms of a serious manufacturer, for a few euros more (I think of a mini S4 within 200 via amazon)