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Updated April 7, 2026

How-To

How to Set Up Low Data Mode on iPhone

Low Data Mode reduces background data use and prevents surprise overage charges. Here is how to enable it for cellular and Wi-Fi.

By Jack Smith  ·  April 7, 2026  ·  7 min read

Quick Steps

For cellular: Settings > Cellular > Cellular Data Options > Data Mode > Low Data Mode. For Wi-Fi: Settings > Wi-Fi > tap the info icon next to your network > toggle Low Data Mode on. Low Data Mode reduces background app refresh, pauses iCloud Photos sync, stops automatic downloads, and limits video streaming quality. It can reduce data use by 30-50 percent with minimal impact on day-to-day usage.

What Low Data Mode Does

Low Data Mode is iOS's built-in tool for reducing data usage. When enabled, it changes several behaviors:

  • Pauses background app refresh
  • Stops automatic iCloud Photos sync (uploads and downloads)
  • Limits video streaming quality on iPhone-default apps
  • Pauses automatic app updates
  • Disables iCloud Drive auto-download
  • Stops Apple News from prefetching articles
  • Reduces FaceTime bandwidth
  • Limits Mail attachment auto-download

The result is dramatically lower data use with most apps still working normally.

Enable Low Data Mode for Cellular

Steps

  1. Open Settings
  2. Tap Cellular
  3. Tap Cellular Data Options (or your specific carrier name if you have multiple eSIMs)
  4. Tap Data Mode
  5. Choose Low Data Mode

The icon next to Cellular changes to indicate low data is active. Some apps may show a warning that they are limited.

Enable Low Data Mode for Wi-Fi

Yes, you can also use Low Data Mode on Wi-Fi. This is useful for hotspots, mobile Wi-Fi devices, or any network with data caps.

Steps

  1. Open Settings
  2. Tap Wi-Fi
  3. Tap the info icon (i) next to your connected network
  4. Toggle Low Data Mode on

The setting is per-network. Each Wi-Fi network has its own Low Data Mode toggle. Useful when you visit a friend with a metered connection.

5G Data Mode Options

If you have a 5G-capable iPhone, Cellular Data Options shows additional choices:

  • Allow More Data on 5G: Uses more data for higher quality video, FaceTime, and downloads
  • Standard: Default behavior
  • Low Data Mode: Maximum data savings

What Still Works in Low Data Mode

Despite the name, most things continue to work:

  • Web browsing (full speed)
  • Messages and iMessage (text, photos, videos)
  • Email (manual fetch only)
  • FaceTime (lower quality but works)
  • Maps and navigation
  • Music streaming (pause buffering)
  • Most third-party apps

What Stops Working

  • Background photo upload to iCloud
  • Automatic iOS updates (you can still install manually)
  • Apple News article prefetching
  • Continuous backup uploads
  • Some advanced features in apps that respect the Low Data API

How Much Data Does It Save?

Real-world data savings:

  • Light users: 1-3 GB per month saved
  • Heavy users: 5-15 GB per month saved
  • Travelers on cellular: 50 percent or more reduction

When to Use It

Low Data Mode On

  • You are nearing your monthly cellular cap
  • You are roaming internationally
  • Connected to a slow or metered Wi-Fi network
  • Tethering to another device via hotspot
  • You want to extend battery (less background work)

Low Data Mode Off

  • Connected to home Wi-Fi with no data limits
  • You need iCloud sync to complete urgently
  • Downloading or streaming high-quality content
Tip: Set Low Data Mode permanently for any Wi-Fi network you connect to outside your home. Friends, hotels, airports, and offices often have data limits or slow connections where the savings are worth it.

Combine with Other Data Savers

For maximum data savings, combine Low Data Mode with these settings:

  • Settings > App Store > Cellular Data > off (no app downloads on cellular)
  • Settings > iTunes Store > Cellular Data > off (no music downloads on cellular)
  • Settings > Photos > Cellular Data > off (no photo sync on cellular)
  • Settings > General > Background App Refresh > Wi-Fi only or off

The Bottom Line

Low Data Mode is the easiest way to reduce iPhone data use without changing how you use the phone day to day. Enable it on cellular if you have a data cap, and on hotspot or metered Wi-Fi networks. The savings are real and the cost is minimal.

Frequently Asked Questions

Does Low Data Mode work on Wi-Fi?

Yes. You can enable Low Data Mode separately for each Wi-Fi network. Settings > Wi-Fi > tap the info icon > toggle Low Data Mode.

How much data does Low Data Mode save?

Typically 30-50 percent of your monthly data use, depending on how heavily you use background sync features. Heavy users can save 5-15 GB per month.

Does Low Data Mode affect video streaming?

It limits video quality in default Apple apps and respects requests from third-party apps. Most streaming apps will use lower bitrates when Low Data Mode is on.

Will Low Data Mode break my apps?

No. Most apps work normally. Only background sync, automatic downloads, and pre-fetching are limited. You can still actively use any app.

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