Yes, the handset support 4G VoLTE. You will surely experience enhanced voice quality and faster internet browsing and download speed. You can also use its native video calling feature for video calls. it also supports Reliance Jio Sim with which you just have to pay minimal data recharge amount as minimal as Rs 399 for 84 days. You also get unlimited calls and SMS along with the plan. Adding to its seamless benefits, it offers nationwide free roaming.
You can find complete specifications here: Lenovo S5
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.