LG G3 is a lucky device as an independent software developer has crafted a custom ROM for the smartphone based on the Android 6.0 Marshmallow software. The unofficial software brings a host of improvements Google has to offer, plus more of the developer's native features.
Android 6.0 Marshmallow has been made available to LG G3 smartphones as XDA brought in its very own version of the software. According to XDA, the custom ROM has almost the same features with the official build or even better. CyanogenMod 13 was effectively ported the ROM from Google Nexus 6 to G3 handsets.
However, G3 models with number D850 will only be the qualified version in the US. This is the version mobile carrier AT&T has. Other models are only available in Hong Kong and the European region with number D858HK and D850, respectively.
The unofficial Marshmallow software will solve issues on the dialer which crashes when calling a number, messaging, gallery, airplane mode, Bluetooth, NFC, the internet, camera, boot loop, 4G/LTE, 3G, and some other issues.
To install the upgrade, here's a good way to go:
1. Download the Marshmallow ROM on PC and device.
2. Turn the phone into recovery mode. If device is rooted, use Quick boot app to boot into recovery, or by pressing and holding the volume down and power buttons together for a few seconds.
3. Perform backup.
4. In TWRP recovery, select Wipe and then Advanced wipe. On the next screen select options such as Dalvik cache, System, Data and Cache. Then do a swipe on the swipe to wipe option.
5. Return to the main recovery menu once wiping task is completed and select Install then Storage.
6. Go to downloaded file's location.
7. Select the file and swipe it to begin installing.
8. When installation is done, restart device.
Before proceeding with the download, make sure to back up all necessary data, charge up phone and free enough storage to prevent interruption.
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