[Sony Xperia S, Acro S, Ion] optimumpro:
Update Posted September 26 2014:

Numerous fixes and additions:

Added Slimbean Extras including Email, Exchange2, Launcher2, Music2 and VideoEditor

Camera delay is positively fixed - absoultely no delay

Removed FM radio which does not work

Instructions:

I always prefer fresh install.

You may try, if you wish and if you already have the previous version, to flash this on top;

If you are doing fresh install, see original instructions (full wipe).

P.S. When you boot for the first time, you will get:

1. Notificaiton that email app stopped (disregard it, the app will work without any further messages)

2. Notification that SU binary should be updated: follow instructions

Regarding bootloops: Do a fresh install, which is always preferred. Also, remember, custom roms based on Cyanogen want all system apps signed by the same key. If you have SU or any other app that you installed in the system (and then flash update on top) that means that those apps are signed by different keys, which would result in a bootloop during subsequent updates. Do research and learn about not messing with system apps. Neither SU nor any other app needs to be installed in system. Also, the same applies if you decompile and mess with a system app - once you re-compile the app, you'll have to sign it and your key is different, which again means bootloop.

Also remember that this rom is designed to work with Stock JB 4.1.2 kernel only. If you have an unlocked bootloader and custom kernel, you will get bootloop and/or other issues

Before posting this update, I reformatted my phone and did a fresh install: no issues. You know what it means: I don't want to hear about bootloops. :)

____________________________________________________________________________

Rom checked on my device: boots 100% in about 25 seconds. Just re-uploaded. This might have been an issue of a corrupt upload.

Slimbean latest release built from sources on September 6, 2014. This is for IONs with locked bootloaders. This is not Kitkat, it is based on JB 4.1.2, which is ages more stable.

Changes:

1. Open source Launcher Advanced (one of few open launchers)

2. Terminal and FM radio added (were missing in original release by Olivier)

3. Battery/Wifi fixes incorporated in code prior to building

4. Radio menu fixed (now when you dial *#*#4636#*#* and go to phone, you no longer get F/C)

5. Default network changed to LTE

The phone seems snappier than with the original release, perhaps because the rom was built on Gentoo, which is the best Linux around. But maybe it is just placebo. You decide.

INSTALL INSTRUCTIONS:

1. Be rooted, have Recovery and JB 4.1.2 kernel

2. Enter recovery, wipe System/Data/Cache (remember factory reset is not enough)

3. Flash the rom, reboot and let it settle, which shouldn't take long

4. Enjoy and press thank you or perhaps donate...

CREDIT: Olivier for initial Manifest and Letama/Olivier/MrGezz for locked bootloader patch

XDA:DevDB Information

Slimbean for Locked Bootloaders, ROM for the AT&T Sony Xperia ion

Contributors

optimumpro

ROM OS Version: 4.1.x Jelly Bean

ROM Kernel: Linux 3.4.x

ROM Firmware Required: Stock Kernel JB 4.1.2

Based On: AOSP Slimbean built from source

Version Information

Status: Stable

Stable Release Date: 2014-09-06

Created 2014-09-07

Last Updated 2014-09-11