[XPERIA X2 General] Leovinus87:
Disclaimer: I am not knowledgeable about phones. I do not code and nor do I usually do what I describe in this post. The contents herein was put together by me in order to avoid confusion for people with the same interest as myself, making my X2 work better/faster or just plain customized. Because of this, I've made a few assumptions and also only described the way that worked for me.

This guide is based on the collective work of forum users, I take no credit or responsibility for its accuracy other than the fact that it worked for me.

This is only the installation steps, they are not specific to my knowledge. There are other guides out there for changing your language and doing more advanced thing, but this is just the basics. At least they are to me. Let us begin.

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Hello and welcome, this post is meant to guide you through the process of customizing the installation of your Xperia X2. My hope is that it will make your phone more responsive, but more importantly give you the option of deciding what you want installed.

The first thing we're going to be doing is to get ahold of the right files to install on your X2. Thankfully these files have been made availiable to us by PavelX1 in his post "NEW ORIGINAL X2 ROMS + Extracted CABs update 14.6.2010"*

Don't let the number and letter jumble intimidate you, on your own X2 the information you need to find the right package is found at Settings -> System -> Unit Information**. Here you'll find a bunch of numbers and letter combinations, if you look closely some of these will correspond to the names of the files availiable by PavelX1. Find the one that corresponds to your unit.

In my case it said that the following:

Software ID: 1230-2397

Software Version: R3AA035

Customization ID: 1231-4911

Customization version : R20A

Language Region: GENERIC_SE

I therefore searched for the following file which matched my information :X2_1230-2397_GENERIC_SE_R3AA035_CDF1231-4911_R20A.rar. Below that file was the file we're interested in for this particular guide. The GENERIC_*your language*_*version*_CABS.rar which in my case was named GENERIC_SE_R3AA035_CABS.

Now what we're going to do is get your computer prepared. Please download the Sony Ericsson Update Service (SEUS) available at their website.

If this is the first time connecting your X2 to your computer it might want to install some drivers in order for your computer to communicate with your phone, this is irrelevant to this guide but I mention it in order to let you know that this is normal and you have done nothing wrong.

Once we can connect to our phone and use its memorycard (which I assume you have) we will open the GENERIC_*your language*_*version*_CABS.rar and extract its contents into it. It has been suggested that you throw in an extra file together with the others availiable in the post "Want a fix for the X2? Only us can do it." on page 3.

We may now move on.

If you already have SEUS installed it was suggested by royalbloodvi in his thread "[TESTED 100% WORKING] Quickest way to get MR2 for those of you who can't get it!" that you remove the following folder C:\Program Files\Sony Ericsson\Update Service\db from your computer. I haven't tried any other way so I'll leave that bit of info as is.

Now we can begin the install process, this will take a little while so don't be in a hurry. It's important that you do not do this on a phone with an empty battery as it may interrupt the install process and cause problems, charge it before you do this. You may also want to backup any files important to you on the phone as they will be removed in this step. As an extra precaution you may want to remove the sim card as well.

Now that we're ready, go to Settings -> System -> Clear phone memory and press it. You'll have reset your phone to its original, empty, state. Connect your phone to your computer, if you haven't already, and begin the update process. SEUS might tell you that your phone is already up to date, this may be true, but we don't WANT it to be up to date, we want to decide what it is updated WITH so click update anyway.

Your phone will reboot. Disconnect your phone from your computer and open the backside of your phone by sliding the lock switch and removing the cover. Remove the stylus and you will see a small depression at the top left that was shidden by it. This is the hard-reset button for your phone which we will be using in a moment. Untill then you wait. Your phone will ask you to calibrate it after the sony logo has shown up. Calibrate the screen and your phone will start installing .cab files. quickly go to the hard-reset we mentioned a moment ago and press the tip of the stylus to it. A click was heard on my X2 when I pressed it and I assume the same is true for yours.

Now your phone will reboot, you will notice that it looks markedly different from what it did before this procedure. Don't worry, we can fix that if you like, but first we must address the window that has popped up and asked if you wish to try the install again. No, no we don't. Click no.

We are now freed from the shakles of oppression that is preinstalled and unremoveable software and may begin installing the files we WANT.

GO to the file explorer and select Storage Card and you will see all of the files we extracted to it previously. In order for you to know which ones you want I suggest that you go to the second page in the thread "Want a fix for the X2? Only us can do it." to get an overview of what the individual files do. Installing them is as simple as clicking them and selecting to what part of the phone you want them installed, I choose to install all of these files to my phone and not my memory card.

Now, to get your phone looking like it did before you did this (assuming you didn't use a panel but a standard theme) you will spot three theme files called X2_Saturn.cab (which is the one I use that looks like the stock one) X2_Saturn_Light.cab (which I don't know what the difference is) and X2_Titan.cab (which I also don't know what it looks like).

And that's that, you're done and hopefully your phone is more to your likeing.

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Here is a shorter step by step guide without the filling, unceremoniously "borrowed" from royalbloodvi and slightly reformatted. Please read the full guide and use this only as a quick procedure guide.

1) Reset your phone.

2) Unpack the GENERIC_*your language*_*version*_CABS.rar to your phones memory card and add the multifix.cab found on this site.

3) Open SEUS, start a new update. Even if it says you have the latest version you want to do it update anyway.

4) Once your phone reboots the calibrations screen will appear. After calibration it will start applying .cab files. Now push the reset button that is hidden behind your stylus and battery cover and it will reboot again.

5) You may now find the files you wish to install on your phones memory card in the file explorer.

*I, as I am a new member, am not allowed to post links, thus the name of the forums from which this information is gleaned is named instead of a direct link.

**If this informations isn't named exactly the same as I have described it, but is merely similar, it could be because I've done a literal translation from Swedish to English.

Edit: I just noticed a very similar guide is available on the General section, which I overlooked. I feel like an ass now. This thread may removed at moderators leisure.