I needed a dual-sim and I was by storm this model because the price is excellent. I was very satisfied with the performance of the Windows Phone. Sound quality excellent, good battery life, it starts very quickly and applications are fluid. After some years of experience with Android impact with this new system was much better than I could imagine. I had read some negative comments quoted keyboard accuracy. Indeed it is true, sometimes the key is not very accurate, but there is the usual and if we start to use the Swype keyboard there are no problems. The most negative side, as the title is GPS. It takes very long to make the fix, sometimes it happens that even after a minute or more, outdoor, positioning accuracy is "within 750m" or more. Not good if you need a laptop to use as a browser or for certain applications like Uber etc. The difference with my old Galaxy S3 is remarkable: with the Galaxy immediate positioning is within a few meters. It's a shame because this problem does not exist with other WP models (eg the Nokia Lumia 625 from a friend). I was almost about to make, but after all the problem is minor to me, and price parity I find that in the market there is nothing better dual-SIM standard. I hope that the GPS reception can be improved in the next updates to WP, although I fear that this is a problem hardware level ...