I've got my Ace 3 get with Android 4.2.2 and the update for Android disabled because the handling of the external SD card is said to have deteriorated. One of my first actions was to root the device and throw down as many apps. OS Monitor usually shows me so 390 MB of free RAM, and then it is very fast (Android should my experience about more than 200 MB of free RAM have). Runtime in stand-by a week and longer. Standby means, telephone and Wi-Fi turned off decidedly, that is, I use the device then only as an alarm clock. I have no problems with the Wi-Ace. 3 The battery consumption can go for unknown reasons after benefits of different apps and calls in the air. I have unable to isolate. For me then helps restart. The GPS is very reliable and loaded the Ace3 via the car's cigarette lighter and quickly. I wanted a small phone that fits nicely in your pocket. If I go need more, I have an 8 inch tablet case (Samungs Tab3 8) and operate it via tethering on Ace. 3