We have already shared with you a custom ROM to update your Nexus 5 to Android 5.1 Lollipop. However, today comes a more stable, fast and quite a familiar name: popular Resurrection Remix Android 5.1! Packed with features and based on CyanogenMod 12, you will also find many bits from the CM12 too. If you are looking for a smooth and stable Android 5.1 lollipop for your Nexus 5, here is the right tutorial for you! Follow the steps to update Nexus 5 to Resurrection Remix Android 5.1 Lollipop.

-Statusbar
-Brightness Slider
-Enable/Disable Show Notification Count
-SuperUser Indicator Switch
-Carrier Label
-Carrier Label Switch
-Carrier label Colour
-Quick PullDown Switch
-Smart Pulldown Switch
-Clock Customizations
-Time & date
-Clock Colour
-Day & date Toogle
-Center Clock/Right Clock Choice
-Battery
-Battery Bar customization
-Battery Icon Customization(circle/landscape/Potrait and more)
-Battery % Text
-Network Traffic Indicator

-Theme Chooser
-RR exclusive PITCH BLACK THEME
-Animations
-Toast Animations
-ListView Animations
-System Animations

-Gestures
-Gestures Anywhere Feature

-App Circle Bar
-Choose apps in App circle
-Trigger Width
-Trigger Hieght
-Trigger Position

-Recents Panel
-Clear All button Switch
-Clear All Tasks Switch
-Clear All Button Location(Top right,Top Left,Top Center,Bottom Left,Bottom Right,Bottom Center)

-Clock Widget
-Clock And Alarm Customizations
-Weather Panel Customizations
-Calender Events

-LockScreen
-Lockscreen Shortcuts
-Choose upto 5 Shortcuts
-100+ Icons for Shortcuts

-Quick Slider Shortcuts

-Notification Drawer
-Weather Display Switch
-Quick Settings
-Choice to Add 20+ Tiles
-Enable 2/3/4 Tiles per Row
-Enable Disable Birghtness Slider in Notification Panel
-Advanced Location Settings Switch(Choose Battery saving/Device Only/High Accuracy Directly in Notification Panel)
-LongPress Toogles to Enter Settings

-Buttons
-Backlight Timer
-Backlight Strength
-Navigation Bar left/Right handed mode Switch
-Power Menu
-Power Menu End Calls Switch

-Home Button(For devices with HW keys Only)
-Home Button Wake Up
-Home Button answer call
-Long Press Actions
-Double Tap Actions

-Back Button(For devices with HW keys Only)
-Wake Up device Switch

-Menu Button(For devices with HW keys Only)
-Wake Up Device Switch
-Short Press Actions
-Long Press Actions

-Search Button(For devices with HW keys Only)
-Wake Up Device
-Short Press Action
-Long Press Action

-Volume Buttons
-Wake Up Device
-Playback Control
-Keyboard Cursor Control
-Swap Buttons on Landscape mode

-Perfomance Profiles
-LCD Density
-Expanded Desktop Mode
-All New CM Audio FX App
-Heads Up Customizations
-OverAll Smoothness Improvements
-Quick Unlock
-Optimizations to Improve Battery
-ALL cm12 Features

Prereqs to update LG Nexus 5 to Resurrection Remix Android 5.1 Lollipop:

• Download and install USB drivers for LG Nexus 5 in your computer.
• Enable USB debugging option by pressing Menu > Settings > Applications. Navigate and tap on Developer Options to ensure that USB Debugging is enabled.
• Your Nexus 5 should be rooted.
• Make sure that ClockworkMod recovery is installed.
• Ensure that your Nexus 5 carries more than 70% of charge.

Update Nexus 5 to Resurrection Remix Android 5.1:

Required files: Download Resurrection Remix Android 5.1 custom firmware from here on your computer. Also, download GApps package from here.

• Connect your LG Nexus 5 to your PC using USB cable and copy the downloaded files to the SD card of your device.
• Disconnect your Nexus 5 and power it off.
• Now boot it in to the CMW recovery mode: press and hold Volume Up, Home and the Power buttons simultaneously. Use Volume keys to highlight and Power button to select.
• Data wipe operations: go to wipe data/factory reset and confirm the operation. Also wipe cache partition and finally go for wipe dalvik cache to clean it up too.
• Now, select install zip from sdcard and then choose zip from Sdcard. Locate the Resurrection Remix Android 5.1 Lollipop file and confirm its installation.
• When the ROM installation completes successfully, repeat the above step for installing the GApps package.
• Once done, go back to main recovery menu and select reboot system now.

First boot takes a little while; enjoy the sweetness of lollipop.