28 Jul 2015

Install android lollipop based Cyanogenmod 12.1 custom rom for htc one V Primou

Htc one v  primou is mid range device released back in 2012 with android ice cream sandwich 4.0 and no further os upgrades were available officially.But this didn't let down this snapdragon single core processor to have updates in other way which we all know by custom roms.

Truly speaking there isn't that many custom roms available for this device even though it is old to android development.Though available few roms are actually upto date with android and now we also have lollipop based custom rom.This one is actually the best that any android user would love to have on their device and is cyanogenmod 12.1.

This is not the official rom from cyanogenmod but unofficial with all features of cm 12.1 with stability and performance too.Though htc one v primou has just 512 mb of it should hold well as we all know that lollipop itself runs fine on low ram devices according to google.

If you unaware  of what primou is it is device specific code name for htc one V.

If you are still on stuck on stock and want to install this rom on your one V but dont know how to start and where to end then don't worry at all we will be guiding you to install this cyanogenmod 12.1 on your one v from scratch which means  we will be guiding you to unlock bootloader of one v and then install Twrp recovery and finally will help you to update it to latest version of andorid lollipop  that is android 5.1.1.

Before proceeding further let you clarify you one thing.We are not responsible if your device gets damaged or it catches fire and burns your entire house.This is a risky process and you have to proceed at your own risk.

Cyanogenmod 12.1 cusotm rom Htc One V primou:
 Cyanogenmod 12.1 custom rom for htc one V Primou
 Cyanogenmod 12.1 custom rom for htc one V Primou

About Cyanogenmod rom:
Cyanogenmod is one of the best custom roms available in android development ecosystem.They support lot of devices.This is based on android open source project with lot of added features.IT uses android 5.1.1 lollipop as base for now and will be updated to later versions of android when available.
Cyanogenmod htc one V Primou
Cyanogenmod rom htc one V Primou
This rom is compiled by a xda senior developer "jonas2790" for htc one v , a big thanks to him for bringing this amazing rom for our device.As we said earlier this is an unofficial one which means its quite natural to have bugs.But basic features are working great.So you don't need to worry at all.
General features of Cm 12.1:
  • Trebuchet: This is the default launcher that ships with cyanogenmod. But if you flash gapps then you might loose this.It doesn't have too many features like nova or other launchers but its simple and fast.
  • Status bar Tweaks:Status bar has lot of tweaks which include a brightness slider.Slide in status bar to adjust brightness of the screen.Double tap on status bar to sleep device and also network speed indicator for on going traffic info.
  • Performance control:A default CPU manager app to control frequencies and governors . You can adjust cpu frequencies and also set them on boot too.
  • Theme engine: 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 tons 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.
    theme engine cyanogenmod htc one v rom
  • Software Updates: Cyanogenmod is usually available in three types one is nightlies which gets updated with new features every night and are quite stable for daily usage.second one is the snapchat which is monthly build version which will be stable version and other one is the release candidate.Some times nightlies are considered must stable than the snapshots. As of now we have android lollipop 5.1.1  in form on CM 12.1. 
  • If you are missing root functionality or all your root apps are not working properly then to developer settings and check if root permissions are set properly.
These are key features of cyanogenmod and you can explore other features by flashing this rom on your htc one V primou.
  • Install Htc one v drivers that is sync on your computer if you don't have any recovery installed as we are going to start from scratch.
  • You must have updated it to latest official software version that is ice cream sandwich
  • Root:You must have root access on your Htc one v.If not then also don't worry as we are going o start from scratch.
  • Battery: Charge your One v to at least 90% so that you wont encounter any battery related problems while flashing this rom.
  • Backup Efs partitions: This is for those who already have recovery installed.Backup all your efs partition of your htc one v on current Rom or firmware.Just in case if you loose signal you can just restore it back.
  • Backup:Backup all your data which includes contacts,apps,photos videos etc everything to computer or any cloud networks as flashing cyanogenmod 12.1 rom on htc one v wipes all your data.
  • Custom recovery: You need a custom recovery  installed on your device.Without it you can not flash roms at all.
  • You must have a unlocked bootloader.
  • Downloadscm 12.1 for htc one v primou and google apps and transfer them to internal storage.
There are 4 major steps which will guide you to have this on your device and we are explaing each step clearly so follow them carefully.

#1: Unlock bootloader of htc one V primou

This is first phase which you have go through before installing any custom rom and  is a simple process but it requires a computer with internet connection.
  • Install Htc sinc on your laptop or pc.
  • Now power off the device completely and wait for few seconds to confirm that it is completely off.
  • Hold volume down and power button at same time for few seconds.When you see hboot release buttons.Using volume keys for navigation select "fastboot" and click on power button to reboot into fastboot.
  • Once you are in fastboot mode connect it to computer using usb cable and if you notice any driver installation process let it complete first.
  • Download  fastboot on our laptop or Pc and install it.You can install it any where but choose location as c: that is default location.
  • open the fastboot folder which you can find it in "c:\programming files".Right click on empty space by holding shift and you see an option "open cmd here".
  • If you don't find this option then press windows and R buttons at same time and type cmd to open command prompt.
  • Now go to fastboot folder and copy the location of it.
  • In command prompt type the command "Cd location of fastboot folder" and press enter.You will notice that fastboot appears in command line.
  • Once you are in fastboot window type "fastboot devices" and press enter.If your device is detected you will get a serial number in list of  devices attached.If not uninstall drivers and install them again.
  • Now type the command "fastboot oem get_identifier_token" and hit enter.You will get a serial key.Copy that key.
  • Now open htcdev.com and register with your email id.
  • One you sign up there.Log in to your account and you will find several options if you explore.
  • Click on unlock bootloader option and select your other supported devices.
  • Proceed all other steps as mentioned and you are are asked to submit Submit your key there.
  • You will receive a mail from Htc which includes a unlock_code.bin file. Download it and move it to fastboot folder which is located in programming files.
  • Now type the command "fastboot flash unlocktoken unlock_code.bin" and hit enter.Check your device ,you will notice a notification on One v primou to confirm unlocking bootloader. Click on yes.This will unlock bootloder and also erases all data of your Htc one v primou.
  • You have a unlocked bootloader device which is ready to accept a recovery to be installed.

#2: Install Twrp recovery on Htc one v 

  • Now download twrp recovery for primou from above link and paste it in fastboot folder.Rename img file which you have copied to fastboot folder as recovery so that it will be easy to type command.
  • Put the device in fastboot mode again.
  • Type the command "fastboot flash recovery recovery.img".This will install latest twrp recovery on your htc one V primou.
  • Once you have installed recovery reboot it and copy cyanogenmod 12.1 which you have downloaded on your computer to one V internal storage and head over to next step.

#3: Flash Cyanogenmod 1.2. rom using Twrp

  • Download Cm 12.1for  htc one v and Gapps transfer it to sdcard or internal storage of your device.
  • Power of  device completely and wait for few seconds to confirm that it is off completely.
  • Hold volume down and power button at same time for few seconds.
  • When you see hboot release buttons.Using volume keys for navigation select recovery and click on power button to reboot into twrp recovery.
  • Once you are in  twrp click on  backup and select all partitions which you want to backup. It might take about 5 minutes for backup to complete. Don't interrupt backup process.
  • Once backup of your existing rom is completed click on back button.Wipe data,cache and dalvik cache and wipe system partition too.
  • Now select Install and navigate to location where you have placed your cyanogenmod Rom and gapps zip files.
  • Flashing this might take about 5 minutes or even less.Once flashing is complete do a factory reset again.
  • Now reboot to system.

#4:Flash boot img through fastboot

If you reboot your htc one v primou after flashing cm 12.1 rom zip file it either stuck at boot logo or doesn't boot at all,that is shows blank screen after rebooting.In this case you have to follow this step.If it boots up without any problem
  • Extract cm 12.1 zip file which you have downloaded on your Pc.
  • You will find a boot.img file copy this file to fastboot folder of step 1.
  • Now power off htc one v.If it stuck on boot logo or bootloop then press and hold power button for about 15 seconds.It will be forced to shut down.
  • Now put it in fastboot mode again.Hold volume down and power button at same time for few seconds.When you see hboot (boot loader) release buttons.Using volume keys for navigation select "fastboot" and click on power button to reboot into fastboot.
  • Now connect it to computer.
  • Open fastboot again.If you don't know how to do it follow step 1.
  • Type the command "fastboot flash boot boot.img" and it will be flashed in seconds.
  • once done type the command fasboot reboot-system or simple disconnect it from computer and reboot it.This time it boots for sure.
All these are to be followed carefully if you flashing this from scratch.Once it boots up you have to wait for at least 20 minutes for initial boot to get passed.If it fails to boot then restore backup which you have made in step 3.

If you have any other issues while update htc one v primou to latest version of android lollipop via cyanogenmod 12.1 custom rom then don't forget to leave a comment below or ping me up in hangouts at any time.
Install android lollipop based Cyanogenmod 12.1 custom rom for htc one V Primou Reviewed by Radha Krishna on 16:01 Rating: 5 Htc one v  primou is mid range device released back in 2012 with android ice cream sandwich 4.0 and no further os upgrades were available o...

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