If your cellular data plan is limited, or if you are abroad and relying on data roaming, keeping track of your data usage becomes especially important. If you keep an eye on your cellular data usage, you may have noticed that the General category under System Services (Settings > Cellular > Cellular Data Usage) is consuming an unusually large amount of data. It seems that this is a widespread problem. For some users, this shows up as a few hundred megabytes in a day; for others, it’s several gigabytes disappearing in minutes, and as I said before, it can be especially frustrating if you’re on a limited plan or roaming abroad, where every MB counts.
We’ve previously covered how to check and reduce your data usage. You may want to check them also.
In this article, I’ll go through whatSystem Services > General is, why it is using huge amount of cellular data, and the steps you can take to reduce or stop it.
What is System Services > General?
It’s a catch-all bucket that can include background OS traffic not attributed to a particular app: networking handshakes, push services, Siri/Apple Intelligence requests, verification calls, App Store background checks, photo libraries syncing, maps data, analytics, and more.
Why are system services using so much data on iPhone?
iPhone "System Services" use a lot of data because of background activity like Location Services, iCloud syncing, automatic updates, and specific app-related processes.
Basic steps to reduce your data usage
- Turn on Low Data Mode: Go to Settings > Cellular/Mobile Service > Cellular Data Options or Data Mode > Low Data Mode.
- Turn Off Data Roaming (when abroad): Go to Settings > Cellular > Cellular Data Options > Data Roaming.
- Disable Wi-Fi Assist: Go to Settings > Cellular > Wi-Fi Assist.
- Block App Store and Photos from Cellular: Go to Settings > Cellular > scroll down > toggle off App Store, Photos, and any heavy apps.
- Reset Cellular Statistics: Go to Settings > Cellular > Reset Statistics so you can track changes clearly.
Fixes for iPhone System Services using too much data
A. App Store & auto-downloads
- Settings > Cellular > App Store: Off.
- Settings > App Store > Automatic Downloads: Off; App Downloads: Ask If Over 200 MB (or Always Ask).
B. Siri & Apple Intelligence
- Siri: Settings > Siri & Search > turn Off "Listen for ‘Siri’/’Hey Siri’" and Press Side Button for Siri (test for a few days).
- Apple Intelligence: Settings > Siri & Search > Apple Intelligence > turn features Off (where available on your model/region).
C. Photos / iCloud Drive / Backups
- Photos cellular: Settings > Apps > Photos > Cellular Data: Off (and Unlimited Updates: Off).
- iCloud Drive cellular: Settings > Cellular > iCloud Drive: Off.
- iCloud Backup on cellular: Settings > Your Name > iCloud > iCloud Backup > Back Up Over Mobile Data (or Cellular): Off.
D. Analytics & location system toggles
- Analytics: Settings > Privacy & Security > Analytics & Improvements > turn Off Share iPhone Analytics (and related toggles).
- Location Services system items: Settings > Privacy & Security > Location Services > System Services > turn Off non-essential "Product Improvement" switches; keep Emergency Calls & SOS / Find My / Setting Time Zone as needed.
E. VPNs, content filters, speed-test apps
- Remove or disable VPN/ad-blocking profiles or apps, at least to test. Some install network profiles that keep background traffic alive.
- Delete speed-test apps while testing — those can create large background transfers or leave profiles behind.
F. Background App Refresh & "while using" permissions
- Settings > General > Background App Refresh > Wi-Fi (or Off).
- For third-party apps you rarely use: Settings > [App] > Background App Refresh: Off; Location: While Using (not Always).
G. Camera/Photos workflow
- If spikes follow shooting photos or video outside Wi-Fi: temporarily disable Photos cellular, avoid HDR/ProRAW/ProRes when you’re off Wi-Fi, and let media sync only after you’re back on Wi-Fi.
H. Roaming strategy
- When roaming internationally, keep Data Roaming Off and use local eSIM data or an unlimited day pass if you can’t risk spikes.
Important: To track down the cause, reset your Cellular Statistics and test one feature at a time — for example, enable only Siri or the App Store while off Wi-Fi and watch if System Services > General spikes. Repeat with other suspects, and if you notice restarts outside Wi-Fi trigger the issue, avoid rebooting until you’re back on a Wi-Fi connection.
