[G2 Q&A, Help & Troubleshooting] Art Vanderlay:
[SIZE=+3]Frequently Asked Questions[/SIZE]

[SIZE=+2]LG G2[/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. [/SIZE]

[SIZE=+1]Q1: How do I root my G2?[/SIZE]

There are several root methods depending on what android version you're on:

IOroot (Jellybean 4.2x/KitKat 4.4x)

New Root Method for LG Devices (Lollipop 5x)

[Japanese L-01F] Root your L-01F [HOWTO]

[SIZE=+1]Q2: How do I restore my phone to stock?[/SIZE]

Visit the Back to stock thread. This has detailed instructions on how to flash factory firmware. If you have bricked your device or are trying to fix software issues then this is the go to method.​

[SIZE=+1]Q3: Can I recieve OTA updates while my phone is rooted?[/SIZE]

Short answer, no. If you have any modified files at the root level of your device this will break OTA. You may have to flash the stock firmware before you take an update.​

[SIZE=+1]Q4: My phone won't connect to my PC. How do I fix this?[/SIZE]

You might be experiencing driver issues. To resolve it take the following steps:

Download the LGUnitedMobile driver here

Open programs and features and delete the currently installed drivers

Launch the exe file of the drivers that you downloaded and let it install

Reboot your PC and try connecting your phone again.

If your still not connecting then try using PDAnet drivers. Again, delete the LG drivers you installed and launch PDAnet on your PC. Let the drivers install and try again.
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[SIZE=+1]Q5: I have a f320/ isai/l-01f . Where is the development for my variant?[/SIZE]

These variants aren't as widely supported as the other ones unfortunately. Many ROM devs support the f320 but the ISAI and l-01f don't get as much love. There are dedicated threads for these variants here:

LG isai LGL22 Central Index - TOT&DLL | KDZ | Root | Recovery | ROM | Discussion

AOSP for Japanese G2 L-01F

[SIZE=+1]Q6: Is it possible to sim unlock the Sprint G2?[/SIZE]

Yes. See these threads:

Sim Unlock ZVG lollipop

Permanent SIM Unlock for LS980 (OTA, APN) JB 4.2.2, KK 4.4.2

[SIZE=+1]Q7: How do I flash a custom recovery?[/SIZE]

If you are coming from stock you need to root your device first (see Q.1). Here are the recovery methods based on android version:

KitKat

Use Autorec from this thread. Pick the correct one for your variant.

Lollipop

Use the Autorec app from the playstore. You can find them here. There is a separate app for each variant so pay close attention to which one you use.

Launch the app and follow the instructions to reboot to recovery.

Jellybean

There are several methods of doing this. Here is the easiest one:

[RECOVERY] [TWRP] [FLASHIFY] Quick & easy
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[SIZE=+1]Q8: What is ADB and fastboot?[/SIZE]

ADB stands for Android Debug Bridge. These are the android tools developed by Google for developers and users to connect devices to a PC and send commands to it. There's a detailed guide to ADB here.
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[SIZE=+1]Q9: What is Bump!!!?[/SIZE]

Bump is a bootloader exploit developed by team Codefire. It's purpose (in a nutshell) is to allow KitKat bootloaders to load custom boot (kernel) and recovery images to allow the flashing of custom ROMs.

By bumping a boot.img the tool signs it using it's magic keys to trick the bootloader into thinking that it is, in fact an official boot.img.
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[SIZE=+1]Q10: I bricked my phone and it is now in fastboot mode. How do I fix this?[/SIZE]

There are several ways to fix it. If you have download mode you can flash a stock image (see Q.2). You can also use the fastboot tools to flash over the damaged partitions (see Q.8).

[MENTION=4008653]somboons[/MENTION] has developed a utility called SRK Tools which has a function to fix fastboot mode, and do many other useful things. You can find his tool here.
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[SIZE=+1]Q11: I rooted my device and now I need to RMA it. Is there any way to unroot/hide root?[/SIZE]

If your device is rooted then there will be a root flag in download mode. This will be there even if you unroot from within superuser.

To remove all traces of root you will need to flash the stock firmware again (see Q.2)
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[SIZE=+1]Q12: What is a bootstack and why is it important?[/SIZE]

A bootstack is a set of partition images that are needed for android to boot. In the case of the G2 partitions need to be slightly modified because the LP bootloader will not load custom images. In other words, if you want to flash a custom recovery and ROM, you need a KK bootloader and bumped kernel and recovery images. Autorec does this automatically or you can flash your own hybrid bootstack
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[SIZE=+1]Q13: My phone is dead or my PC recognises my phone as QHSUSB_BULK/Qualcomm 9006/8 or security error. How do I fix this?[/SIZE]

These errors occur when your device has mismatched/corrupt or missing partitions. This can occur by flashing the wrong ROM, Autorec or bootloader. (eg. nuking your bootloader will give you a security error.) In the case that you still have download mode, you can just flash a stock image to fix it. If your phone is not booting into any mode but it's recognized by your PC then pay attention to device manager to see how windows sees your phone. For QHSUSB_BULK see here and here.

Alternatively you can use the Srk Tools. For qualcomm 9006 see here For Qualcomm 9008 or if your phone is not recognized by PC (windows/mac OR linux) and does not boot then you may need to follow this guide to revive your phone.​

[SIZE=+1]Q14: How do I enter recovery with the button combination?[/SIZE]

If you have a custom recovery you use the button combination to factory reset.

Power off the device

Hold volume down and power button until you see the LG logo

For JB/KK Hold volume down and power

For LL Hold volume down and volume up

Enter at the factory reset screen

[SIZE=+1]Q15: What is an EFS and why is it important?[/SIZE]

Your EFS partition contains some important and some basic info related to our device identity like Bluetooth MAC address, wireless devices MAC addresses, product code and the very main IMEI address, radio settings, programming parameters for the device such as your account information (phone number, etc), data provisioning parameters, etc. An EFS cannot be replaced. It is unique to every device and it is highly recommended that you back it up soon after rooting your device. See this thread for a how to. EFS Partition Backup and More [All G2 Variants
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[SIZE=+1]Q16: I updated my phone and now the touch screen is erratic and my IMEI is gone. What is happening?[/SIZE]

This scenario is common to G2's that are refurbished with mixed parts of many G2 variants. Typically the vendor has used a motherboard from any random G2 variant and packaged it as a d802. It is fixable however, see this thread for more details on how to identify your model. You must get the real model number which is written on the bottom of the mainboard and then flash a stock image accordingly. Restoring your IMEI is trickier though. It is easy if you have previously taken an EFS backup (see Q.15). You can flash the EFS backup zip or use dd to restore modemst1 and 2.

Without an EFS backup you cannot restore a lost IMEI. There are methods that claim to work and they are worth exploring but there is nothing that is definitely known to restore a lost IMEI.
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A special thanks to everyone who contributed to the production of this FAQ
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