[Sony Xperia Miro, Tipo (Dual), J, E] Lorehaze:
Hi at all, i spent much time to study the best optimizations for our xperia j and now i'll write an how-to that can help you to improve your performances and battery life!​

Requirements

:

FTF of .31 FW (You can find it in the Xperia J Thread)

FTF of Vengeance 1.40 and

Vengeance 1.46

Flashtool

Bootloader Unlocked

1. Cleaning your phone

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Make a backup of all of your files like photos, contacts, messages, etc, than proceed with this guide.

Open Flashtool, connect your phone in fastboot mode and flash vengeance 1.40.

Now, reboot your phone, boot first to cwm and wipe and format all (but not the external sd), next boot to TWRP and wipe all, android secure included.​

2. Installing the firmware

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With flashtool, select .31 FW, connect your phone into Flashmode, than flash the FW. Finally, connect the device to fastboot mode, then flash Vengeance 1.46.

Now, Reboot the phone, then configure it.​

3. Optimizations

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Go to Play Store, than install this applications:

Terminal Emulator, Busybox (Stephen Stericson), Root App Delete, Greenify, TouchPal X Keyboard, Battery Calibrator.

For this step, we have to download this three packages:

- Flash Gordon, an alternative recovey

- Modules for Kernel

- Deodexed ROM - ZIP flashable - (Thanks to [MENTION=5034254]Aeron sagar[/MENTION]) --- Here is the official dowload page --- ​

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| Busybox |

|__________|

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Fist of all, open busybox and wait until the loading finish.

Once it's finished, click install, and select smart install. Now, when smart install has finished installing, close busybox.​

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| Flashgordon |

|____________|

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Install Flashgordon's apk, open it, gave it superuser permissions if requested.

Select "Modules.zip" form your sdcard, select "✓" symbol on "Wipe Dalvik Cache", now click "Flash" and reboot.

Once rebooted, select "Deodex.zip" leave all "✓" and click "Flash", now just reboot.​

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| Root App Delete |

|________________|

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Open "Root App Delete" and gave it superuser permission if requested.

Select "System App" and disable all of thoose apps:​

AccessoryKeyDispatcher

CalendarSync for Facebook

Update Center

Chrome web browser

CredentialManagerService

CustomizationProvider

CustomizedApplicationInstaller

DrmDialogs

Facebook and all it's extensions

GoogleBackupTransport

Helpappics

OMAClientProvisioning

OmaV1AgentDownloadServices

Retail Demo

Smart Connect

SEMCSetupWizard

Sony Select

Timescape and all plugins

Chinese Keyboard

VerifyCertificatesDummyAppApplication

VerifyCertificatesDummyAppMedia

VerifyCertificatesDummyAppPlatform

VerifyCertificatesDummyAppShared

Go to "User Apps" and unistall thoose apps:

Chrome

Facebook

Office Suite

PlayNow

Smart Connect

Now, Simply reboot your phone.
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| Greenify |

|_________|

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Open greenify, touch on "+" symbol and select the apps you want to freeze when you don't use them, then, click on "✓"
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Now, we've finished, reboot your phone and see the differences!^^

P.S. Don't forget to do a battery calibration, it increase your battery performances!

P.P.S. If i helped you, simply hit thanks ^^

P.P.P.S. Sorry if i haven't a perfect english but i'm italian and i'm 14 ^^