iOS 15 Cellular Data Usage Settings Changes

With the release of iOS 15, Apple introduced notable refinements to how iPhone users monitor their mobile bandwidth within the Settings app. This update brought a more granular breakdown of system services, clearer distinctions between active and removed applications, and updated tracking for cloud-based network features like iCloud Private Relay. These adjustments make it easier for users to identify background data drains without relying on third-party tracking tools.

Granular System Services Categorization

Prior to iOS 15, system-level consumption was often grouped into broad, ambiguous categories. iOS 15 expanded the System Services menu (found at the bottom of the Cellular data list) to provide detailed reporting for specific background operations. Users can see exact megabyte and gigabyte counts for:

  • DNS Services: Network lookups required to resolve domain names.
  • Siri and Dictation: Audio processing and cloud-assisted query results.
  • Software Updates & Device Analytics: Background diagnostic reporting and firmware checks.
  • Push Notifications & Networking: Persistent connections maintained by Apple servers.

Integration of iCloud Private Relay

iOS 15 introduced iCloud Private Relay for iCloud+ subscribers, which encrypts Safari traffic and sends it through dual network hops. Consequently, the cellular usage breakdown in iOS 15 accounts for this overhead directly within system-level network metrics, preventing relayed traffic from being misattributed to general Safari browsing or unaccounted network activity.

Separation of Uninstalled Apps

To maintain accurate accounting throughout the billing cycle, iOS 15 distinctly isolates data consumed by apps that have since been deleted from the device. This appears as a separate line item labeled Uninstalled Apps directly in the Cellular settings list, ensuring that total period calculations remain consistent even after clearing storage.

5G Data Mode Alignment

Alongside the cellular tracking menu, iOS 15 refined the interface for data allocation policies on 5G-capable devices. While not an overhaul of the measurement meters themselves, the breakdown screen integrated contextual options for Data Mode (such as Allow More Data on 5G and Low Data Mode), directly linking how high-definition FaceTime calls and background iCloud backups impact the cumulative totals displayed in the current tracking period.