Got the same problem, since update game runs much slower,
especially if i arrive a fight with a lot of planes or a explosion from tank shoots
, sometimes near to complete freeze of screen.
Never had this problem before update, i played in high Resolution
before.
I tried now in lowest resolution but with no effect...
stopped all apps in background
And uninstalled lots of applications, no effect. Reinstalled game, no effect....
My mobile is HTC Desire