Hello guys, I have the same doubt fellow, and I already decided that I will get the device (same promo?ao the companion) will stay with the Activ S, for some reasons I think the staff not taking this into account here, that the question of previous experience, I was using a Galaxy S3 a few days ago (I lost) so I think anyone who uses a device to a big screen not want to go back ever again for a smaller screen, and not to mention that I love the product Samsung I think a lot of style, not to mention the expense of battery are one of the most discussed terms in any round of conversation on phone, then I think the Lumia sins by being too good with his super bright screen and a battery, (WP8 controls shine as it should not only have low medium and high) I had a S3 Chingling that had a battery of the same amperagen that the Lumia 820 and bear the jolt the whole day without problem, simply by controlling the screen brightness dele.Eu dispense one 4G (my region will take much dc 2050 I think) and wireless charging, a bigger screen and a lot more storage style Ativ S without problem.