Mostsly API Updates according to MS:
Third update for Windows Phone 8.1 Preview for Developers to roll out
Third update for Windows Phone 8.1 Preview for Developers to roll out
Maybe placebo, but my battery has been better after the latest update.
How many approximate size needed in this update ?
In curious of the changes... Lets see what people notice.
Can't honestly say I've noticed any real difference. However my gripe list at this point is fairly small in that my WiFi occasionally goes brain dead and Touch/Scroll could still be improved just a tiny bit.
As for size, Ironically MS doesn't list download size when grabbing the update (unlike when it updates an app for example), but downloading the update on a 1520, 1020, and 822 all occurred pretty quick, just a couple of minutes really.
Wifi dead many times and touch/scroll problem is really annoying on sucha high end phone