If your Android phone is suffering from suboptimal battery life, you may be suffering from suspend_backoff problems. This happens when the phone is woken up by applications in quick succession, so it decides to keep the phone awake for a little while. For example, there is data to be sent over WiFi, so the WiFi connection is kept awake, which keeps the phone awake.
After I upgraded my Sony Ericsson Xperia Arc from 2.3.4 (GingerBread) to 4.0.4 (Ice Cream Sandwich), I noticed that it was laggy and slow.
With Gingerbread 2.3.4, and ADW Launcher as the home screen, everything was fine.
Upon using the "top" command, either from ConnectBot, or from adb via the USB case, I noticed that com.google.media and com.google.acore are eating up most of the CPU time.
You can also go into Settings Developer Options and turn on the CPU overlay which will tell you the top processes eating up CPU.
Note: This article is Android version dependent. Before you do it, you have to upgrade your phone. Use the article on Making your Sony Xperia Arc faster using Android 2.3.4 Global Generic 4.0.2.A.0.42.
Root your phone
Root your phone using zergRush.
Remove the junk applications
$ adb shell $ su #
If you have a slow Sony Xperia Arc, then probably you have Timescape and carrier bloatware that makes your phone slow (e.g. Rogers in Canada). In this tutorial, I will explain the steps that I did to make the phone considerably faster.
Install PC Companion and Update Service
In order to flash a new ROM on your phone, you will need first to install Sony Ericsson's PC Companion as well as Update Service on your Windows computer. This is needed so that the required USB drivers are installed and configured.
Do you have a Sony Ericsson Xperia phone running Android? Such as the Xperia X10 or Xperia Arc? Is it slow and lags often?
We have a solution for you ...
But before we tell you, we have to explain why Sony Ericsson's Android can be slow. The reason is Timescape, Sony's user interface for Android phones. Even if you disable all the Timescape widgets from your home screens, it will still be running under the hood.
You can root a Sony Ericsson Xperia Arc from Rogers (Canadian mobile phone network), using the zergRush method.
The method works for Xperia Play and other models as well.
For this, I used an Arc running Android 2.3.3 Gingerbread.
Follow the instructions on the above page.
1. Download the package.
2. Rename the package.
mv 7mD63kpsKzGmaou5hcftBV zergrush.zip
A very nice surprise from Sony Ericsson. Even though Android does not have full and official support for Arabic until Android 4.0, their handsets do have very good Arabic support by default, even handsets sold in the USA and Canada.
Arabic in Sony Ericsson Xperia Android phone
If you have Android 2.1 or 2.3 and updated it to the latest update from your carrier, then you do have Arabic support. To check if it works, then just visit BBC Arabic and see if Arabic shows correctly and the letters are connected.
Enabling Arabic keyboard
To enable Arabic typing, you need to press Menu, then select "Language and Keyboard", then under "Keyboard settings" select "Default input", then select "Writing Languages", and check "Arabic". You will then see a language switching icon on your keyboard (the "globe" symbol).
Not only does Arabic work well, the font looks much better than what is in CyanogenMod for example.
This is great news!
They started with publishing steps on how to unlock the boot loader, and how to build the Linux kernel for Xperia phones.
Thanks Sony Ericsson ...
For the Xperia X10, when upgrading the software using Sony's PC Companion, you will get full Arabic support on the phone, with a beautiful font, and no glitches. The only drawback is the phone is unrooted, and therefore you lose functionality of apps that require root (e.g. Titanium Backup, ShootMe), and have the bloated apps that autostart (Timescape, Moxier Mail, ...etc.)