How to enable Volte in Samsung SM-A720F /A7


How to enable Volte in Samsung SM-A720F (2017 Version)
I’ve purchased Samsung A7(2017) from dubai but once I tried using this phone on JIO /Airtel /Vodafone voLTE was not working . After a lot of research, I’ve made this working. Here is the list of tasks, we have to do:
·         Select the right Stock-Firmware and download before you start the other stuff
o   Get the model number [ Settings -> About phone -> Model Number ]
in my case it was SM-A720F
o   Note Down your baseband version
[Settings -> about phone -> Software Information -> Baseband version]
in my case A720FXXU9CTE1
Check the highlighted number U9 , while downloading this needs to be matched against Indian stock firmware else you will get error similar to below because binary did not match :
“sw rev check fail device 9 binary 7 error”
o   Go to Sammobile and put model name, country etc and it will show you list of firmware name for your model  :

Look for your version (my case 8.0.0), PDA version (that has above required binary, In my case it was U9



                        File will be approx. 2+ GB so have patience and let it get complete.
o   Download ODIN for flashing the stock firmware (I’ve used   : Odin3_v3.13.1)
o   Install Samsung drivers , alternatively you can install Samsung’s SmartSwitch, Which will install the necerssory driver in your computer

·         Enable setting in mobile phone
o   Enable developer mode :-> Click the build number 6-7 times [Settings -> about phone -> Software Information ]
o   Enable OEM unlock
[ Settings -> Developer options -> OEM unlock ]
o   Enable USB debugging
[ Settings -> Developer options -> USB Debugging ]
o   Remove any pin pattern/locking/screenlock fingerprint etc

·         If you can take backup, please do so of your data, but for complete backup (system image, file system etc) your phone needs to be rooted, that will void your warranty, so better avoid if you are under warranty.  
If your phone is rooted, then you can install custom recovery and take full system backup


·         Second Last Step ( Flashing the firmware )
o   Downloaded firmware will be a rar/zip file , unrar/unzip it , it will show you 4 files .  Here is the screenshot :


o   Connect Mobile to laptop , let driver get installed (if required)
o   Open ODIN, Once ODIN detect your phone it will show you COM Port as below
Click and select the file for 4 boxes in ODIN , AP file to AP field , BL file to BL etc , leave the last ODIN field blank
Here is what I’ve selected –
o   Don’t click anything on Options tab or Pit. Let it be default . Here is what default looks like





o   All set, Click Start and Wait for 4-5 minutes. If all successfully it will show message like below
·         

o   Phone should automatically restart as factory reset.

·         Last Step (configuring voLTE ) .
o   Ideally it should show LTE now , If not then no need to worry , perform below
o   Make sure “Network Mode is – LTE/3G/2G”
o   Reset “Access Point Name( APN setting)”
o   Restart Phone
o   Wait for 5 mins, after restart and Check if you are able to make call or not
o   If still it does not appear on the top , then perform below
o   Shutdown the phone , and Start the phone in “recovery mode”
HOME + Volume Up + Power Button ( Once Galaxy Logo Appears, release the Power button ) Wait for 2-3 minutes , it will show “Android Recovery”
Select “Wipe cache partition” , Click Yes

o    Hope you will be able to see it now. I was able to get voLTE it after this step.







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