This document outlines six ways to reduce data usage on mobile devices:
1. Capping data usage on Android by setting data warnings and limits.
2. Using Low Data Mode on iOS which restricts background data usage, streaming quality, and automatic downloads/backups.
3. Limiting background data usage by restricting apps from using data in the background.
4. Disabling app sync for specific apps to prevent background data usage.
5. Using data compressing apps to reduce the size of transmitted data.
6. Ensuring app sync only occurs over Wi-Fi and not mobile data to avoid data charges for backups.