Upgrade Firmware

Update your At&t Lg g3 D850 to android lollipop by flashing Resurrecton remix custom rom . At&t variant of Lg G3 has a model number as "D850".It is powered by a snapdragon 801 processor with 3gb of ram along with 32gb internal storage.Primary camera on this device is 13mp while secondary camera is a 2.1mp sensor.It sports a 5.5 inch display with quad hd resolution which is protected by corning gorilla glass 3 layer.It houses a huge 3000 mah battery and also supports lte.

This custom rom which we are going to flash on lg g3 is specific to device with model number D850 which belongs to at&t.So if you don't have it just be away from this as flashing this on other model number might result in either boot loop or brick.To check your device model number go to settings and then to about device.You will find your device model number and confirm it as "D850".

Why to go for a custom rom on At&t lg G3?

• Less bloatware: Usually Carrier variants comes with lot of bloatware and unwanted stuff.This might hinder performance a bit which might result in laggyness.Custom roms will have less bloatware or no bloatware at all as a result of which you will notice its performance is much better than on stock rom.
• Better performance: Though performance can be increased by controlling cpu and Gpu  with root apps you might not achieve what you want.There is better scope for performance on custom roms as developers implements different mods to make it perfect.
• Battery life: Battery life is always opposite to performance.Greater the performance least the battery life  you get.In order to get a balance one between them you have to go for custom roms. 
• Better customisation: Most of the apps with root access will work better on custom roms than on stock roms.For instance take xposed installer.It offers lot of modules for customisation but will work perfectly on custom roms than on stock one.

Prerequisites:

About resurrection rom:

This Resurrection remix rom which your are about to AT&T LG G3  D850 is based on android 5.1.1 lollipop and is based on cyanogenmod,slim,omni and original remix roms.So you can all the best features of other roms are included in this rom along with performance and a decent battery life.

Features of this rom:

• Navigation bar tweaks: You can enable disable or navigation bar and also you can adjust the size of navigation bar.Navigation ring included toggles to in case of quick access just swipe from bottom of screen and you can access apps which you have set.
• Status bar tweaks: Status bar has lot of tweaks which include a brightness slider.Slide in status bar to adjust brightness of the screen.Various tweaks are available to carrier label too like color and switch.Quick and smart pull down are also present.Battery icon too has tweaks.
• Gesture anywhere: This basically lets to open any app at any time(while using other apps) with just a gesture.You have to set the gestures and use them.


• Recent panel mods: Stock recent panel do not have an option to clear all the apps at once.In this rom you a button to clear apps and can even set the position of the button.
• App circle Bar:Swiping from the left or right edges of the screen an app bar pops up and you can choose what app you want to launch.This is great way of multitasking.
• Lock screen mods: This includes placing of 5 shortcuts on lock screen and also set targets for the slider.
• Theme enigne: Theme engine is from the cyanogenmod custom rom which basically changes the look user interface from lock screen  to ring tones all the way up to boot animations.The speciality of the theme engine is the ability to choose individual elements of every theme you have installed.So you like the ring tones and wallpapers of one theme and icons of other theme then you can have them at a time.Just open the theme chooser and you will understand how to do it.

These are some of the features of the resurrection remix rom and you can explore more features by flashing this custom rom on  At&t LG G3.

Flash this custom rom using CWM recovery:

1. Download  resurrection remix rom D850 and Gapps transfer it to sdcard or internal storage of device.
2. Power of the device completely.
3. Press volume up ,volume down and power button simultaneously and once you see boot loader screen release buttons.
4. Using volume down as a navigation button move to recovery and click on Power button to confirm action and Device boots into CWM recovery.
5. Once you are in CWM recovery Create a nandroid Backup first.
6. Wipe data,cache and dalvik cache including system.
7. Flash rom and then gapps.
8. Reboot to system.