LG G4 Bootloop

As from yesterday at Friday, 15 January 2016 at 6:40 am, on my LG G4 i was just listening to music without any trouble with it, the device is not rooted, haven’t downloaded anything that could cause this boot loop but just regular apps such as nova launcher, games,a music player, etc. and around 7:20 am, when i got my phone out of my pocket, i see the LG Logo "Life's Good" Powered by ANDROID on, too me it seems like it just restarted it self but after a few minutes seeing that the phone wont boot up so i've decided to take out the battery, sim card out of it and insert it back in but it hasn’t worked at all. Then decided to hard reset the device after a few attempts to take out the battery and put it back in the device, when i got to the menu to erase everything i had downloaded on the device and confirmed to Hard Reset it, the reset wouldnt work and the screen would go back to the LG Logo "Life's Good" Powered by ANDROID screen. Can anyone help with this problem without rooting, i have my contacts, music all of that backed up on a app.

EDIT : at 7:20 am Friday, 15 January 2016 when it took out my device, i decided to back up my stuff just in case, realising that the battery has gone from 99% to 94% in 2 minutes, seeing that the system has estimated that the device will last until 2 hours.

EDIT #2: Through out the day at Friday, 15 January 2016 the device gave me a chance to go to the lock screen, me thinking that the boot was over until about 2 minutes or so the device went to the boot loop again " Only getting 2 chances to log on my phone"

EDIT #3: Only once, i have seen a little rectangular box "During the Bootloop" stating that "Android Is Starting" "Optimizing apps" but then after a few minutes the devices goes to a boot loop again.

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Clarification Request
Also stuck in LG G4 Bootloop

Mine has started rebooting this morning, Jan 24. How does one backup before a factory reset if it doesn't get past the "Android Is Starting" "Optimizing apps" screen?

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You backup when things are working.

Not after it crashes. This is not a PC, there is no HDD but you might have a memory card you can save by removing it.

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Last hurrah before service.

Remove the SIM and memory card and battery. Press and hold the power button for 60 seconds just in case (why is on the web.) Now slip in the battery, apply power and hope.

If not, time for LG service.

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Boot Loop

I am having issues with my phone being stuck in a boot loop but if I take out the SIM card it only stays on boot screen for a little bit then black & nothing. With the SIM card it sits at the boot screen forever and ever. Any help?

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I can't tell if you tried what I wrote.

Try it and if it doesn't come back, it's off to service.

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LG G4 Bootloop Fix | How I Unbricked it (Video Included)

So after doing some research, I attempted a "Fix" myself. After the attempt, I was able to browse the web, watch videos via the YouTube app and enjoy the features of the camera and all the functions the LG G4 has to offer.

Here's a quick video on what was done to get the G4 back up and running...

Feel free to share the link or embed to provide assistance to others.

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