You need to dial a number and then choose the video call option on the screen on the bottom left. Alternatively, you can make video calls using WhatsApp and Skype as well.
You may need to configure your phone for the first time.
1. Make sure your phone settings have VoLTE enabled.
2. Dial *#86583#*. A window will pop up.
3. Enable VoLTE Register, Visible VoLTE Switch, and Video calling ability.
4. After that, you will see an option of video call when you make a normal call towards the bottom of the screen.
You can find the full specs here: Vivo V7 Plus
You don't need to enable VoLTE. Insert the Jio (VoLTE enabled) in any slot. By default VoLTE will be active. If it is not, you can change the network preferences from Network option in settings.
Protect apps on Vivo V7 Plus
Now, whenever you open a locked application, you can either unlock it by simply verifying your fingerprint or by entering the unlock pattern. The fingerprints that you have registered for unlocking your device are the ones that will also work with App Lock.
Here is the video guide to do the same
There are 2 dedicated slots for GSM Sim card and 1 dedicted slot for the MicroSD card in Vivo V7 Plus . You can use MicroSD card up to 256GB inside it.
You can check this video
Vivo V7 vs Vivo V5 Plus
Both the phones have their pros and cons,lets analyze :-
Advantages of Vivo V5 Plus
1.Better Screen Resolution:-More resolution means sharper and crisper screen.
2.Slimmer:-Slimmer devices are easier to carry in pocket and look more fashionable.
3.Has Dual Front Camera:-Dual front camera is useful for certain effects like blur, zoom and wide angle selfies.
4.More Storage Capacity:-More memory allows you to store more songs, videos, photos and install more applications.
5.Bigger Battery:-It can generally last more time.
Advantages of Vivo V7
1.Light Weight:-Light weight devices are easier to hold without tiring your arms.
2.Supports Memory Card:-Memory cards give your device more storage capacity. So you can store more songs, photos and videos.
Verdict - In my opinion, Vivo V5 Plus is better overall performance and price ,if you need light weight and memory card support you can go for Vivo V7 .
You can also compare these devices on 91mobiles