How to Install/Upgrade ANDROID NOUGAT (7.0 - 7.1.1) (Without Root) on almost any device

here i have Samsung galaxy grand.which is very old device and not getting any Android OTA update from Samsung Since last 2 years.
so i have decided to install new android nougat manually.
here i am going to install Lineage OS ROM. which is successor of cyanogenmod rom.
Lineage os was launched in december 2016 after cyanogenmod announced it was discontinuing its development.

before starting we need to download some files.
these are the list of files we need :

1. Lineage OS ROM for android nought 7.1.1.
2. Odin software
3. TWRP recovery tar file which is
Team Win Recovery Project (TWRP), is an open-source software custom recovery image
for Android-based devices.TWRP will replace your default stock recovery.
4. Gapps File which is nothing but google application package here i have downloaded micro package.
which include some basic google application like gmail,youtube,playstore etc. you can choose other package to
or you can install more apps manually using play store afterwards.

Watch My Youtube Tutorial  How to Install/Upgrade ANDROID NOUGAT (7.0 - 7.1.1) (Without Root) on almost any device

Step to Follow:-

1. copy Nougat Lineage OS ROM and TWRP Recovery tar file to sd card.
2. install & run odin software on your pc.
3. now Turn off your phone & press power,menu and volume down button simultaneously..
4. connect phone using data cable to the pc. you will
get an option to continue or restart. press volume up button to continue now you are in download mode.you will get
"added" status on odin.
5. check & click on pda and browse for TWRP recovery tar file,leave all other
setting to default then press Start . you will see the progress bar on phone and odin.
once completed you will get pass status in green on odin that means you have
successfully installed TWRP recovery mode
6.your phone will restart automatically turn off your phone again.
7.now press power,menu and volume up button simultaneously to get newly installed TWRP recovery mode.
8. now your are in recovery mode. first backup your phone. back up your data like EFS, Videos,Photos,Music,contact etc.
here i have already backup my phone.
9.after that go to wipe and clear dalvik cache.
10.then click on install browse to ext sd card and add lineage os nougat rom and gapps zips
files in queue to install. swipe to confirm flash and wait until process complete.
11.once completed your phone will restart and you will see lineage os boot logo. it will take some
time to boot.and then you will get the setup screen. follow the instruction.
12. you have successfully installed Android Nougat 7.1.1 on your device.

if you have any questions regarding installation post it in the comments.

Download :-

1. Lineage OS ROM for android nought 7.1.1
https://download.lineageos.org/
2. Odin software
https://goo.gl/HBPFsY
3. TWRP recovery tar
https://twrp.me/Devices/
4. Gapps File
http://opengapps.org/