[LG Optimus L90] shinobisoft:
[SIZE=+3]Frequently Asked Questions[/SIZE]

[SIZE=+2]LG Optimus L90[/SIZE]​

[SIZE=+1]This a short list of frequently asked questions in this device forum and the answers often given as a response. It should serve as a starting point for gathering knowledge and finding solutions to many common problems. Please only post in this thread with feedback on how to improve this document. Do not post "Thank you" type responses. If you have additional questions or require more help, try to find an existing thread or create your own. Do not use this as a general help thread.[/SIZE]

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[SIZE=+1]Q1: How do I root my LG L90?[/SIZE]

Please view the [GUIDE][ROOT] Root your LG L40/L70/L90/G2 mini! thread​

[SIZE=+1]Q2: How do I unlock my bootloader?[/SIZE]

LG-D415 models, please view the [GUIDE] Unlock Bootloader for T-Mobile L90 (D415) thread.

All other variants, please view the

[GUIDE] Unlock Bootloader and Flash Custom Recovery L90 D410, D405n, D405 [CWM][TWR] or the [SCRIPT] LG Optimus L90 Utilities threads.
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[SIZE=+1]Q3: How do I enable fastboot?[/SIZE]

Please view the [GUIDE] Fastboot for L90 D415 thread.

You can also use [SCRIPT] LG Optimus L90 Utilities.​

[SIZE=+1]Q4: How do I make partition backups or dumps?[/SIZE]

Please view the [SCRIPT] LG Optimus L90 Utilities thread​

[SIZE=+1]Q5: How do I unroot and flash back to stock?[/SIZE]

Please view the [Easy][GUIDE][UNROOT][RELOCK BOOTLOADER]Flash Stock KDZ Offline LG L90 [All Variants] thread.​

[SIZE=+1]Q6: Can I use the Xposed Framework with the L90?[/SIZE]

Yes​

[SIZE=+1]Q7: How do I enable write access to my external sdcard?[/SIZE]

Install Xposed Framework. From the Xposed Framework Installer, on the Download page, download and install 'KitKat SD Card Full Access' module and the 'HandleExternalStorage' module. 'KitKat SD Card Full Access' fixes the inability to write to the SD Card and 'HandleExternalStorage' allows read/write access to the SD card for all apps.​

[SIZE=+1]Q8: Can I use Link2SD with the L90?[/SIZE]

Yes​

[SIZE=+1]Q9: How do I swap the internal sd card for external sd card?[/SIZE]

Install Xposed Framework. From the Xposed Framework Installer, on the Download page, download and install 'XInternalSD' module.

Please see the [Xposed][MODULE][4.0+] XInternalSD thread for more detailed information.​

[SIZE=+1]Q10: I bricked my phone, where can I get stock partition images[/SIZE]

Please view the LG Optimus L90 Stock partition images thread​

[SIZE=+1]Q11: Where is "Developer Options" in Settings?[/SIZE]

Developer Options are initially hidden from the user on a clean installation. Go to Settings -> About Phone. Scroll down to "Build number" and tap 7 to 8 times to enable Developer Options. Developer Options should now be accessible in Settings.
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[SIZE=+1]Q12: I'm running XXX ROM and the developer asked for a logcat. What do I do?[/SIZE]

This will get a bootup log from the device. This requires the use of a PC as well as ADB. Get ADB by installing the Android SDK, or download Minimal ADB with fastboot ( for Windows only ). This also assumes that LG's USB drivers have been previously installed.

Power off device

Open a command prompt in the folder where you extracted the Minimal ADB contents to or where your copy of ADB.exe lives on your filesystem

Type:

adb -d logcat > logcat.log

and press Enter. You will see "*** waiting for device ***" . "logcat.log" can be any unique name you prefer.

Attach USB cable to PC and Power on device

As soon as you notice life in the device or the LG logo appears attach USB cable to device. The command prompt window will appear to hang. Don't worry. About half way thru the bootanimation the command prompt will return normally. You can then find the logcat in the same folder as ADB.exe.

[SIZE=+1]Q13: I'm running XXX ROM and the developer asked for a dmesg. What do I do?[/SIZE]

This requires the use of a PC and the ADB executable binary. See Q #12 for a link for Minimal ADB for Windows if you don't have ADB installed on your PC.

Open a command prompt window where the ADB binary lives.

Type:

adb shell su -c dmesg > dmesg.log

and press Enter. "dmesg.log" should be any unique filename of your choosing. You will now find the dmesg log in the same folder as the ADB binary.

[SIZE=+1]Q14: I've flashed a custom recovery but what are the key combos to get there?[/SIZE]

NOTE: This is also how to perform a factory reset if you don't have a custom recovery installed

Power off the device

Press and hold Power + Volume down

When the LG logo appears on the screen, quickly release the Power button, still holding the Volume down button, and press and hold Power again until the "Factory Reset" screen appears. Don't worry, this won't reset the device.

Use the volume keys to navigate up and down and Power to select. Scroll down and select "Yes" and repeat once more. It may take up to 10 seconds for the device to boot to recovery.

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[SIZE=+1]More FAQ's will be added as my time allows and they are brought to my attention[/SIZE]​

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