You can control how much data Netflix uses when streaming on mobile networks on your iOS or Android mobile devices.
Adjusting the cellular data usage settings for your account is the easiest way to reduce the amount of data used while watching Netflix. There are four data usage settings to choose from. Each estimate below is per stream:
Automatic - Netflix will select a data usage setting that balances data usage with good video quality. Currently this will allow you to watch about 4 hours per GB of data.
Wi-Fi Only - You will only be able to stream on the device while connected to Wi-Fi.
Save Data - Watch about 6 hours per GB of data.
Maximum Data - Recommended only if you have an unlimited data plan. This setting will stream at the highest possible quality for your device and the content you are viewing. This may use 1 GB per 20 minutes or more depending on your device and network speeds.
To select the setting that works best for your mobile data plan:
While in the Netflix app, select the Menu icon. This will either appear as in the upper left corner or in the upper right corner.
Select App Settings.
Select Cellular Data Usage.
Select your preferred setting.
Data setting changes you make from your mobile device apply to that device only while streaming over mobile networks. While connected to Wi-Fi, we will attempt to stream in the highest quality possible for your connection speed and the content you’re watching.
If you have also set your data usage for all devices with the Playback settings on your Account page, streaming on mobile devices will not exceed this setting. For more information on playback settings, visit How do I control how much data Netflix uses?