I am using Lumia 520. Last week I updated my phone OS from Lumia Black to Lumia Cyan. After that update the game crashes a lot, REALLY A LOTTTT...!!! In-between a game, screen freezes and gets crashed. I am having dogfight version 4.4.55 Lite. Sometime, i loses my controls for like 4-5 seconds. Please fix this bug in the next update.