I migrated from a Sony Xperia ZL to my Lumia 1520 and can't be more happy. The ZL was just problems and issues with the quality of the speakers, people most of the time never hear me... Then mms messages never went thru, unable to receive pictures or videos, sometimes I got a pic but most of the time never. I am happy I sold that piece of junk and got my 1520. The first thing I did was to test my mms and everything works, pictures and video messages works like a charm. The speaker quality is amazing compare to the Sony. Sony's phones are made with the most lowest quality in the industry. The only good thing of their phones are the camera, other than that... Junk.