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.
You can see full specs here: Oppo A83
Go to Settings, Personal, Backup and reset, and select both Backup my data and Automatic restore.
Go to Settings, Personal, Accounts & Sync, and select your Google account.
Select all of the option boxes listed, to ensure that all available data is synced.
To Transfer files from your phone to another device.
1. To transfer data from your phone to a Laptop
Use the data cable that came along with your phone. Simply plug in your device and start transferring your data to your laptop.
2. To transfer data from a phone to phone.
There are many ways you can transfer your data like Using the Shareit app(https://play.google.com/store/apps/details?id=com.lenovo.anyshare.gps&hl=en), Bluetooth etc.
Using shareit app: Just download the shareit app on both the phones and open it.then select the app, photo, video you want to transfer from the list and press "Send". It will search for the nearby device. Once the device appears tap on that your file will be transferred
You can check the complete specs of this phone:
To buy a phone on EMI, you must have a credit card with appropriate Credit limit.
Then you can head to any online store like Flipkart and Amazon to buy your phone on EMI.
a. Open the App or website on your phone or PC
b. Then select the phone you want to buy and press buy now.
c. Select the Address and Tap on "Continue"
d. Select the "EMI" option as the mode of payment and Click on Continue.
e. Select your bank
f. Select the EMI time period from the optionsm
g. Enter your card details and make the payment. You can check the price of Oppo A83 Pro
g. Enter your card details and make the payment.
You can check the price of Oppo A83 Pro
Turn on Battery Saver
1. Go to settings.
2. Then tap on Battery option.
3. Then Tap on Battery saver option
4. Then select the percentage at which you want to trigger the battery saver in your phone and you are Done.
You can also check the video below for more description
You can check the complete specs of this phoneOppo A83 Pro
Hide Photos and Videos on your phone
To hide photos and videos on your phone you will have to download the app named "Gallery Vault" and follow the steps below:
And you will see a confirmation message on your screen as shown in the Image below.
And you are done!
You can also check the video below for your reference:
You can check the complete specs of this phone
To set an MP3 file for use as custom ringtone system-wide, do the following:
1.Copy the MP3 files to your phone. ...
2.Go to Settings > Sound > Device ringtone. ...
3.Tap the Add button to launch the media manager app. ...
4.You will see a list of music files stored on your phone. ...
5.Your selected MP3 track will now be your custom ringtone.