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.
Alternatively, you can follow a much easier way:
You can check the below video to get more clarity:
Definitely, Vivo V15 Pro is not waterproof. Though it has a non-removable back cover, still it is not waterproof. It may sustain a few splashes of water, but it will not withstand a drop in water. IP67 or IP68 certification is not very easy to attain. All the ports, SIM stray, and speakers need to be waterproof and ensure no water penetrates. You need to be careful while using your phone, if it drops in water, you definitely need to get a new one.
You can follow the below mentioned steps to save battery:
1. Turn off notification from less used apps:
Real notifications are handy in some cases like email. But there is plenty of less important app that wants notification permission. Turn off those notification permissions. To do this Go to settings> Notification and status bar> App preferences. Choose and set important push message such as WhatsApp, what are enabled and disable other apps which you don't use often.
2. Turn off GPS:
GPS is another battery draining cause. Many apps request location permission using GPS. Turn it off to save your battery. You can use Wi-Fi-based location rather than GPS
3. Enable battery saver in Security app:
In MIUI 8 security apps comes with lots of feature including battery saver. Enable battery saver in security saver to get ultimate battery experiences.
4. Set/Adjust Screen Brightness:
Automatic Brightness: It is a good choice for adjusting screen brightness. But setting a constant brightness also save battery life. To set constant brightness Personally I prefer constant brightness and you can access them in Settings> Display> Brightness level.
5. Turn off vibration on press:
Every time you press on phone display it makes vibration. It is obviously power consuming. Turn off vibration on press to prolong battery life
6. Turn off Wi-Fi:
Turn off Wi-Fi when not needed. It is not mandatory to turn on Wi-Fi 24/7. It consumes huge battery.
7. Turn off Sync:
Syncing is also drained battery. Though it is important for apps like email but turn it off when not needed. You can turn in off in Settings>Sync.
8. Turn off excessive vibration:
Vibration kills your battery life. Try to avoid vibration mode. For app notification, you can turn it off in Settings> Notification and status bar> App notification> Choose only apps you want them to vibrate.
9. Turn off auto update:
Apps like Google Play store and app store constantly connect to the server to check for the updated app. This process drains battery fast. Turn off auto update to prolong battery life
10. Shorten Screen Timeout time:
Screen consumes huge battery. You can save some charge by shortening screen timeout time. Head towards Settings> Lock screen and password> Sleep and choose the time you prefer
11. Use static wallpaper instead of live wallpaper:
You can save some battery by shortening Use static wallpaper instead of live wallpaper Try to avoid live wallpapers.
12. Turn on Airplane Mode in low signal areas
Phone consumes most battery in week signal area. So, turn on airplane mode when the signal is too poor.
13. Keep phone updated:
Updated ROM comes with optimization and bug fixes. So, keep your phone updated to prolong battery life.
14. Turn on Power saver mode:
You can simply swipe the notification bar and turn on the battery saver mode so that the battery usage is optimised.
All the Android phones have Google Assistant built in them as a basic feature. It is just like a personal assistant which activates on your voice commands and helps you set alarms, reminders and find stuff on the internet. You can activate the Google Assistant in 2 ways:
Honestly speaking, fast charging is the most relevant and important feature these days in phones. You can charge your phone fully within minutes while you are getting ready to leave your home. Yes, Vivo V15 Pro supports fast charging. It has a 4500mAh battery.
Imagine you open your old phone and you are unable to unlock it. The only choice you have is to hard reset it. It is just a mechanism to erase everything on your phone and restore all the defaults. The memory is erased and the password is reset. You can follow this simple guide to hard reset your device.
There are some photos which are very personal you want to keep them only to yourself. If someone see them by chance, it becomes very awkward and embarrassing. To avoid that, you can simply install the Vaulty app and feel safe while handing over your phone to anyone:
Yes, Vivo V15 Pro supports OTG. USB OTG or USB On-The-Go is one of the most recent technologies that allows you to connect your pen drives and in some cases hard disks to your smartphones and tablets. It has a cable and through that cable, you can directly view and use your pen drive in your smartphones.
To root your phone manually, you need to turn on USB Debugging.
XDA Developers is a great site to help you with the process, support and Custom ROMs.
Check the below video for One click root method that works on many latest devices:
Steps to Disable App notification
Check reference video below: