[Xperia Arc General] shantusingh:
*** Please read all steps carefully as i edited a little, to show steps more accurately ***

I take back my words from sony... ICS is awesome and not bad!!

I was on gingerbread 2.3.4 .62 version i reseted my phone using factory data reset, erased sd aswell. Then i Installed fresh .62 my country generic using flash tools. Then skiping setup guide and without signing in google or even activating wi-fi i straight away updated via Sony PC Companion to ICS by selecting mass storage mode .

As it got updated to ICS i powered phone on and completed the setup guide of it.. Then i switched phone off and took out the battery, sd card, and even sim card for few seconds like 20-30 seconds. Then inserted all back in, powered phone on and rooted it and its unbelievably good than the previous time i installed ICS.

Maybe Sony can't say to us that after installing new ICS and completing startup guide steps, then switch off and then take out battery,sim,sd card and insert it again and power on... So please do this once guys, it may surely show You the difference!

If you are already on ICS and facing problems, just do factory data reset and repair your phone via sus or PC Companion after backing up ur data, then after completion turn your phone on complete the setup guide, switch phone off and then take out the battery n stuff, and insert it back, power on and then see it should definately show u improvement!

* Please definately turn on your phone once after you install ics and complete setup guide or skip it and then switch off and take out battery,etc and insert it back then n on it *

I have installed many apps, games, etc and its still very smooth, dialer even opens very fast, 1-2 sec it takes time but as u click it forces itself to show it wants to open as fast as it can on ICS .

The more i installed apps it didn't slowed down!!

Picking up call was very smooth really, no lag/glitch atall .!!

Video plays smooth and perfectly fine .. love the task bar, browser is nice too!

* Note: I did removed junk apps from sys/apps (i did it before and that time i didn't felt any much difference as it lagged, but this time it massively improved by doing this)

Great hardware acceleration... install's apps fast, opens them quickly and smoothly.. love it now!! No wi-fi issues ..

I feel clarity/screen of phone looks gr8,better and smater on ICS

I noticed about the framerate per second (fps) that as i used Quadrant Standard test. Earlier on gingerbread it showed me in somewhere 3d/2d benchmark about 49-52 fps, edit: now on ics it shows maximum 49-50 fps in the test.

Camera is all fine is still smooth i havn't noticed any difference/slowness while recording ..

When moving from one home screen page to another, it rarely but does lags which would be nice if it gets fixed if a new update be provided... Same happens in the in-menu icon pages, and when pressed the menu button it lags rarely and then opens the menu mayb tries to show smoothness but lags instead. I am just on transition animation .5x and windows animation also on .5x (But really these cons can be managed and ignored as they rarely show little lag)

Games not playable, i don't know who to blame but many are not playable, and i know it will be fixed soon so no worries ...

Edit : Temple run got fixed itself with its new update! So its a game makers issue ...

So in the end i am now going to stick to ICS and not going back atall ..

Please press thanks if this method helped :)

Latest Arc S Quadrant Standard test Result on ICS 4.0.3 :

Video of Ics Performance on My Xperia Arc S : http://www.youtube.com/watch?v=tmEb2gCrTVE&feature=youtu.be

**Please note i was seing my phone via cybershot's screen so wasn't able to click icons accurately sometimes, so its not any response/touch issue or anything with the phone**

I did slow page to page turn so to show i am not skipping or faking it as i believe turning pages fast would be wrong and ignoring its real performance and wouldn't be able to make out or show if its really lagging or not :)

Its all infront of you, So what do you say or think of it?!

Cheers!!