Hi,
Like you i had the following problems with ICS:
- Delay with incoming calls
- General performance slowdown (comparing with previous firmware)
- Slow Camera
After Downgrading and Upgrading the firmware a bunch of times, i changed to a different approach and now i'm happy with ICS
WARNING:
- With my tips you will lose some phone functionality (because you will disable apps)
- You don't need to root
- You just need to use oficial tools
UPGRADE YOU PHONE USING uliwooly method:
Charge Phone to 100%
Turn Off phone
Start SUS
Accept Terms and Conditions
Select Phone
Plug USB in PC
Press & Hold the volume down key (keep pressed)
Plug smaller side of USB in mobile (Volume down is still pressed)
Wait 10 seconds till you see an instruction on screen to leave volume down key
Wait 1 hour for updating and installing updates
Switch On.
After updating and turning the phone on, inserting pin and move on the wizard, let the phone rest for about 10 minutes to let the update scripts finish then reboot your phone (turn off and on)
Unistall all apps preinstalled with your phone
Go To Settings ->Applications -> Tab All and disable all apps you dont need including the ones related with timescape, ea games, email and exchange if you dont use it, etc.
The idea is too leave the system as basic as we can and need.
Format your memory card
Update the phone apps and reboot your phone
Switch to nova launcher which is a lot faster that standard ICS launcher
Install any remaining apps that you need
This is what i did and i have excellent performance and battery time, no root, no background limit process setting, just plain stock.
I hope this helps you.
