[GUIDE] How to root and flash a rom on P500 - Optimus One, P500, V General

TUTORIAL FOR ROOTING OPTIMUS ONE WITH NEW BASEBAND STEP-BY-STEP
NOTE: YOU MUST FOLLOW EVERY STEP + DO'S AND DON'T'S CAREFULLY WITHOUT ERROR OR YOUR PHONE MAY END UP NOT WORKING
Quote (MUST READ!):
Disclaimer:
Your warranty is now void. I am not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. Please do some research if you have any concerns about this before continuing! YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you. If anything goes wrong, I will not be responsible for it.
Prerequisites:
LG Optimus One P500 with new baseband + phone upgraded to software Official Gingerbread 2.3.3, kernel V20G
A USB Cable
A Windows Computer or Mac with Windows Parallels/Bootcamp
NOTE: There are two sets of optional steps, but please do it or you will lose ALL your data on your phone. Nothing will be loss on the SIM Card and sdcard.
STEPS:
1.1. Connect phone to computer
1.2. Turn on USB Mass Storage
1.3. Turn on USB Debugging (Settings -> Apps -> Enable Android Debugging)
1.4. Search in your start menu/metro search and type 'run'
1.5. When the program opens, type 'cmd' press ok
1.6. Type the following commands: (DO NOT TYPE WRONGLY) (PLEASE WAIT A WHILE AFTER EACH LINE):
- adb devices
- adb shell
- echo 1 > /data/local/lge_adb.conf
1.7. Reboot phone (aka power off and on)
(If successful):
2.1. Go to Google Search and find 'Superoneclick' and download from the first suggested link (it's named SuperOneClick.zip)
2.2. Once finished downloading, unzip/extract the files
2.3. Open the file, run SuperOneClick.exe
2.4. Change Exploit to ‘psneuter’ (If there is Gingerbreak or Auto, choose it instead)
2.5. ROOT!!! (IT WILL FREEZE/HANG/LAG, BUT IT'S NORMAL, JUST DO NOT TOUCH/CLICK IT)
2.6. If asked for Busybox Installation and Superuser Installation, YES
2.7. Reboot phone and cross your fingers!
(If successful):
3.1. Disable USB Debugging
3.2. Open internet (Google Chrome, Mozilla Firefox, Internet Explorer, Apple Safari etc.: all will work) [NOTE: If you are on Windows 8, DO NOT use the 'Metro Internet or Chrome from the start menu]
3.3. Go to any random rom link and download the rom + gapps package
(Optional, but recommended) (You can skip to step 5.1)
4.1. Go to Settings -> Display -> Sleep -> Select the longest one possible (you must do this)
4.2. Download Titanium Backup from Google Play Store
4.3. Open Titanium Backup App
4.4. Press the menu button (the most left hardware button) and press 'Batch"
4.5. Under the 'Backup' category, click 'run' on the option that says 'Backup all user apps + system data, then "some random number" at the back
4.6. Let it run (DO NOT ROTATE YOUR SCREEN + OFF YOUR PHONE + LOCK YOUR SCREEN + CHANGE APP OR IT WILL FAIL)
4.7. Download SMS Backup & Restore from Google Play Store
4.8. Open SMS Backup & Restore App
4.9. Select 'Backup' and let it do the work (DO NOT ROTATE YOUR SCREEN + OFF YOUR PHONE + LOCK YOUR SCREEN + CHANGE APP OR IT WILL FAIL TOO)
(continued):
5.1. Connect your phone to the computer
5.2. Enable USB Mass Storage
5.3. Go to your favorite rom and download both rom and gapps zips (you can find roms from Google Search or other xda threads and posts, gapps are also available at goo.im/gapps)
5.4. Transfer both files to your phone's sdcard
5.5. Download ROM Manager from Google Play Store
5.6. Open ROM Manager App
5.7. Flash Clockworkmod Recovery
5.8. Reboot into Recovery
(If successful):
(Move up and down with volume keys, select with the search button)
6.1. Wipe data/factory reset
6.2. Wipe cache partition
6.3. Advanced -> Wipe Dalvik Cache
6.4. Install zip from sdcard -> Choose zip from sdcard
6.5. Install both the rom zip and the gapps zip that you downloaded earlier
6.6. Reboot, fingers crossed again!
6.7. The LG logo should be shown, then some fancy animation (aka boot animation) will be shown
(If successful):
7.1. Follow the setup given (if any)
7.2. Done!
(Optional, but compulsory if you have done step 4):
8.1.Go to Settings -> Display -> Sleep -> Select the longest one possible (you must do this)
8.2. Download Titanium Backup from Google Play Store
8.3. Open Titanium Backup App
8.4. Press the menu button (the most left hardware button) and press 'Batch"
8.5. Under the 'Restore' category, click 'run' on the option that says 'Restore all missing apps + system data, then "some random number" at the back
8.6. Let it run (DO NOT ROTATE YOUR SCREEN + OFF YOUR PHONE + LOCK YOUR SCREEN + CHANGE APP OR IT WILL FAIL)
8.7. Download SMS Backup & Restore from Google Play Store
8.8. Open SMS Backup & Restore App
8.9. Select 'Restore' and let it do the work (DO NOT ROTATE YOUR SCREEN + OFF YOUR PHONE + LOCK YOUR SCREEN + CHANGE APP OR IT WILL FAIL TOO)
8.10. Now you are done!
Sincerely,
Deathy
If there are any problems, feel free to comment/private message me.
I have tried this method and it has worked wonders for me.
If there really are problems, check these:
The steps above (duh)
The ROM you have downloaded
The gapps packaged you have downloaded

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[GUIDE] Tutorial for existing user cm flashing
TUTORIAL FOR EXISTING USER CM FLASHING STEP-BY-STEP
NOTE: YOU MUST FOLLOW EVERY STEP + DO'S AND DON'T'S CAREFULLY WITHOUT ERROR OR YOUR PHONE MAY END UP NOT WORKING
Quote (MUST READ!):
Disclaimer:
Your warranty is now void. I am not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. Please do some research if you have any concerns about this before continuing! YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you. If anything goes wrong, I will not be responsible for it.
Prerequisites:
A rooted LG Optimus One P500 with a custom ROM flashed on it before
A working Clockworkmod Recovery
STEPS:
1.1. Connect your phone to the computer
1.2. Enable USB Mass Storage
1.3. Go to your favorite rom and download both rom and gapps zips (you can find roms from Google Search or other xda threads and posts, gapps are also available at goo.im/gapps)
1.4. Transfer both files to your phone's sdcard
(If successful);
2.1. Reboot into Recovery by holding down power button or by powering off your phone and hold home + volume down + power together for 10 seconds
2.2. Install zip from sdcard -> Choose zip from sdcard
2.3. Install both the rom zip and the gapps zip that you downloaded earlier
2.4. Reboot, fingers crossed!
2.5. The LG logo should be shown (unless replaced), then some fancy animation (aka boot animation) will be shown
2.6. Done!
NOTE: Wiping data + cache is NOT necessary unless you are downgrading from CM10 to CM9 or to CM7 etc.
NOTE ALSO: If you are upgrading from say, CM7 to CM9 or to CM10, just flash it like a normal zip according to the steps above unless stated otherwise.
Sincerely,
Deathy
If there are any problems, feel free to comment/private message me.
I have tried this method and it has worked wonders for me.
If there really are problems, check these:
The steps above (duh)
The ROM you have downloaded
The gapps packaged you have downloaded

---

I know that the reason for this guide is to be the simplest as possible, but I wouldn't recommend using ROM Manager to install the Custom Recovery, as it have already given me bootloops (it is a common error with using ROM Manager to install a Custom Recovery). I would recommend using Flash Installer GUI and Amonra recovery.img, which is a lot safer.

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Do you format /system for custom ROM?
Is it required to format /system ?
If it is required then it should be between 6.3 and 6.4 .
Correct me if I'm wrong.
EDIT:
I was wrong. flashed jelly bean on O1 and all going well !
Lousyguyy said:
TUTORIAL FOR ROOTING OPTIMUS ONE WITH NEW BASEBAND STEP-BY-STEP
NOTE: YOU MUST FOLLOW EVERY STEP + DO'S AND DON'T'S CAREFULLY WITHOUT ERROR OR YOUR PHONE MAY END UP NOT WORKING
Quote (MUST READ!):
Disclaimer:
Your warranty is now void. I am not responsible for bricked devices, dead SD cards, thermonuclear war, or you getting fired because the alarm app failed. Please do some research if you have any concerns about this before continuing! YOU are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you. If anything goes wrong, I will not be responsible for it.
Prerequisites:
LG Optimus One P500 with new baseband + phone upgraded to software Official Gingerbread 2.3.3, kernel V20G
A USB Cable
A Windows Computer or Mac with Windows Parallels/Bootcamp
NOTE: There are two sets of optional steps, but please do it or you will lose ALL your data on your phone. Nothing will be loss on the SIM Card and sdcard.
STEPS:
1.1. Connect phone to computer
1.2. Turn on USB Mass Storage
1.3. Turn on USB Debugging (Settings -> Apps -> Enable Android Debugging)
1.4. Search in your start menu/metro search and type 'run'
1.5. When the program opens, type 'cmd' press ok
1.6. Type the following commands: (DO NOT TYPE WRONGLY) (PLEASE WAIT A WHILE AFTER EACH LINE):
- adb devices
- adb shell
- echo 1 > /data/local/lge_adb.conf
1.7. Reboot phone (aka power off and on)
(If successful):
2.1. Go to Google Search and find 'Superoneclick' and download from the first suggested link (it's named SuperOneClick.zip)
2.2. Once finished downloading, unzip/extract the files
2.3. Open the file, run SuperOneClick.exe
2.4. Change Exploit to ‘psneuter’ (If there is Gingerbreak or Auto, choose it instead)
2.5. ROOT!!! (IT WILL FREEZE/HANG/LAG, BUT IT'S NORMAL, JUST DO NOT TOUCH/CLICK IT)
2.6. If asked for Busybox Installation and Superuser Installation, YES
2.7. Reboot phone and cross your fingers!
(If successful):
3.1. Disable USB Debugging
3.2. Open internet (Google Chrome, Mozilla Firefox, Internet Explorer, Apple Safari etc.: all will work) [NOTE: If you are on Windows 8, DO NOT use the 'Metro Internet or Chrome from the start menu]
3.3. Go to any random rom link and download the rom + gapps package
(Optional, but recommended) (You can skip to step 5.1)
4.1. Go to Settings -> Display -> Sleep -> Select the longest one possible (you must do this)
4.2. Download Titanium Backup from Google Play Store
4.3. Open Titanium Backup App
4.4. Press the menu button (the most left hardware button) and press 'Batch"
4.5. Under the 'Backup' category, click 'run' on the option that says 'Backup all user apps + system data, then "some random number" at the back
4.6. Let it run (DO NOT ROTATE YOUR SCREEN + OFF YOUR PHONE + LOCK YOUR SCREEN + CHANGE APP OR IT WILL FAIL)
4.7. Download SMS Backup & Restore from Google Play Store
4.8. Open SMS Backup & Restore App
4.9. Select 'Backup' and let it do the work (DO NOT ROTATE YOUR SCREEN + OFF YOUR PHONE + LOCK YOUR SCREEN + CHANGE APP OR IT WILL FAIL TOO)
(continued):
5.1. Connect your phone to the computer
5.2. Enable USB Mass Storage
5.3. Go to your favorite rom and download both rom and gapps zips (you can find roms from Google Search or other xda threads and posts, gapps are also available at goo.im/gapps)
5.4. Transfer both files to your phone's sdcard
5.5. Download ROM Manager from Google Play Store
5.6. Open ROM Manager App
5.7. Flash Clockworkmod Recovery
5.8. Reboot into Recovery
(If successful):
(Move up and down with volume keys, select with the search button)
6.1. Wipe data/factory reset
6.2. Wipe cache partition
6.3. Advanced -> Wipe Dalvik Cache
6.4. Install zip from sdcard -> Choose zip from sdcard
6.5. Install both the rom zip and the gapps zip that you downloaded earlier
6.6. Reboot, fingers crossed again!
6.7. The LG logo should be shown, then some fancy animation (aka boot animation) will be shown
(If successful):
7.1. Follow the setup given (if any)
7.2. Done!
(Optional, but compulsory if you have done step 4):
8.1.Go to Settings -> Display -> Sleep -> Select the longest one possible (you must do this)
8.2. Download Titanium Backup from Google Play Store
8.3. Open Titanium Backup App
8.4. Press the menu button (the most left hardware button) and press 'Batch"
8.5. Under the 'Restore' category, click 'run' on the option that says 'Restore all missing apps + system data, then "some random number" at the back
8.6. Let it run (DO NOT ROTATE YOUR SCREEN + OFF YOUR PHONE + LOCK YOUR SCREEN + CHANGE APP OR IT WILL FAIL)
8.7. Download SMS Backup & Restore from Google Play Store
8.8. Open SMS Backup & Restore App
8.9. Select 'Restore' and let it do the work (DO NOT ROTATE YOUR SCREEN + OFF YOUR PHONE + LOCK YOUR SCREEN + CHANGE APP OR IT WILL FAIL TOO)
8.10. Now you are done!
Sincerely,
Deathy
If there are any problems, feel free to comment/private message me.
I have tried this method and it has worked wonders for me.
If there really are problems, check these:
The steps above (duh)
The ROM you have downloaded
The gapps packaged you have downloaded
Click to expand...
Click to collapse

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rogervn said:
I know that the reason for this guide is to be the simplest as possible, but I wouldn't recommend using ROM Manager to install the Custom Recovery, as it have already given me bootloops (it is a common error with using ROM Manager to install a Custom Recovery). I would recommend using Flash Installer GUI and Amonra recovery.img, which is a lot safer.
Click to expand...
Click to collapse
I use ROM Manager to flash CWM Recovery.
This is just the preferred method as CWM is widely used (as I can see, correct me if I'm wrong).
You method works too (I saw it used on youtube before), uses Amon ra recovery instead. It both works, as they are both recoveries that allow flashing.
Thanks for your suggestion!

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Thank you so muuuuch xD