The biggest data users are usually:
- video streaming
- TikTok, Instagram Reels, YouTube, and other video-heavy apps
- video calls
- cloud photo and video backup
- automatic app updates
- system updates
- sending or uploading large images and files
- hotspot sharing
- online gaming
Even if you are not actively using your phone, apps may use data in the background for syncing, backups, notifications, photo uploads, and updates.
May 21, 2026