after two days of use I only have positive things to mention about this smartphone of very good quality at a reasonable price. The sound quality is very good conversation, time with the battery is impressive. The screen quality is excellent and the application usage is very fluid. For GPS, quick and accurate. My first impressions are very good. One can only regret that Acer did not include 4g on this model. But for my part I made that choice and I do not regret it.