[Android Software/Hacking General [Developers Only]] mikey199:
This is my modified cwm backup rom based on Chadw1985 Ice Flex Sandwich. This is based on 3.1 with blue keyboard. I made this to have good battery and good performance. It gets about 2x battery compared to ice flex. Deepsleep it used 1% in 1hr 45min. It runs both cores but trys to keep 2nd core offline unless you need it. Been running this last few days seems to work good. Plays games with no problems.

To Install:

Download the .zip, create a folder anywhere you want name it FlexBackup or something similar. Extract the contents of the .zip file to this folder. Then copy that folder to /external_sdcard/clockworkmod/backup/. Shutdown the phone and go into CWM recovery and format cache, data, and system. Then choose a advanced restore, restore system from the folder you placed on your sdcard. Do a factory data reset and reboot. If it works like it did on mine, the setup wizard will force close once and open again. It does not do it the second time it displays. Its because I deleted the stock home app. Runs without issue after this. - Written by Chadw1985

If you do happen to get a md5 sums mismatch,

here is fix provided by timmythanoob:

Make sure to have ADB Drivers installed on your CPU

Only Works If you have Android SDK or ADB installed correctly

Connect phone via USB

Open start menu in CPU

Type CMD in search box and hit enter

in Command Prompt window type Cd C:/Andoird-SDK-Windows/Platform_Tools/

then type:

adb shell

cd /external_sdcard/clockworkmod/backup/(nameofbackup)

rm nandroid.md5

md5sum *img > nandroid.md5

- Written by Chadw1985

Has everything chadw1985's rom has plus

Deleted sony walkman player and widget

replaced sony digital clock widget with digital clock widget

added exdialer for phone and contacts

Froze att sync app

added system apps (system tuner,green power speaker booster etc)

added init.d tweaks

Ac!d sound mod

Removed opera web browser

Email + Exchange push aosp email app

tweaked init.qcom.post_boot file

Probably a bunch of other things I forgot to mention.

Rom is Good battery and very loud using speaker booster i use speaker booster @ 90% max volume. nice and loud, not as loud as wifes sony xperia ion but gets close.

Download Chauncey Ice Flex Rom

Hope you enjoy. Will be adding more in the future hoping we can get better battery life!

Version 2: Based on flex ice rom 4.0

Going for ICS look and feel.

- lowered sound still very loud but not speaker bursting.

-removed sony apps

-trebuchet 0.1 launcher

-added stock ics inverted email

-jb camera and gallery (sphere and photo strip not working. First time using camcorder go to setting and set video quality to 1080p or it won't save.

-inverted calendar

-removed some extra apps

-build.prop edit + tweaks

- lots of stuff

Note: still have att contacts and phone (boo). Apn may be set to straight talk wireless change if on different carrier. This rom is my daily user. Has great battery life. Let me know what you think.

When i get computer access i will build a cwm flashable rom. Should be soon. Enjoy.

CFIRv2 "link fixed" https://docs.google.com/file/d/0B67nAR5IFPoYaWF2dWZLY1J0dkE/edit?usp=drive_web

Version 3:

-Google Search widget added

-build.prop tweaks

-init.d tweaks

-v

V6 Supercharger (50% charged)

-removed ics dialer

-fixed youtube videos only playing thin line (use firefox"confirmed" or dolphin or dolphin beta should work) stock browser and chrome not supported.

-removed android terminal

-various tweaks and fixes and little stuff.

leave a comment let me know what you think!

CIFRv3 Download: https://docs.google.com/file/d/0B67nAR5IFPoYZHk1ekdyQXVFQWc/edit?usp=sharing

Version 4

- More V6 supercharging (100% Charged)

- Bug fixes

- Build.prop edits

- Modified Services.jar

V6 Supercharger makes this thing fly. All tweaks applied but experimental ones.

CIFRv4 Download:https://docs.google.com/file/d/0B67nAR5IFPoYNU91Z2FTOWFwZUU/edit?usp=sharing