Why does my mobile phone BBK vivo v2 consume so much traffic?

Mine is V 1 I didn't pay much attention to it when I first started using it the other day. Later, it was found that this traffic was really wasteful. If I use this mobile phone to surf the Internet, I can only chat. I don't want to download any software. It is best to download it on the computer. If possible, it is best to use a wireless network. I only use traffic when it is out of range. Honey, adopt!