[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["缺少我需要的資訊","missingTheInformationINeed","thumb-down"],["過於複雜/步驟過多","tooComplicatedTooManySteps","thumb-down"],["過時","outOfDate","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["示例/程式碼問題","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間:2025-07-27 (世界標準時間)。"],[],[],null,["# Mobile network security\n\nIn Android 16, a new section called\n**Mobile network security** is introduced in the [**Safety Center**](/docs/security/safety-center/overview) under\n**Settings**. It contains two subsections as shown in the following figure:\n\n**Figure 1.** Illustration of Mobile network security section.\n| **Note:** The device should support **both** the notifications and 2G toggle features for the **Mobile network security** section to be visible.\n\nNotifications\n-------------\n\nIn this subsection, a toggle enables or disables the display\nof system notifications when a user's device is connected to an unencrypted\nnetwork or when the device exchanges device identifiers such as IMSI or IMEI\nwith the network.\n| **Note:** The toggle's default state is OFF.\n\nThe toggle is visible if the device modem supports IRadio version 3.0 and the\nfollowing IRadio APIs.\n\n- [`setSecurityAlgorithmsUpdatedEnabled`](https://android.googlesource.com/platform/hardware/interfaces/+/refs/heads/android16-release/radio/aidl/android/hardware/radio/network/IRadioNetwork.aidl#707)\n- [`securityAlgorithmsUpdated`](https://android.googlesource.com/platform/hardware/interfaces/+/refs/heads/android16-release/radio/aidl/android/hardware/radio/network/IRadioNetworkIndication.aidl#319)\n- [`setCellularIdentifierTransparencyEnabled`](https://android.googlesource.com/platform/hardware/interfaces/+/refs/heads/android16-release/radio/aidl/android/hardware/radio/network/IRadioNetwork.aidl#693)\n- [`cellularIdentifierDisclosed`](https://android.googlesource.com/platform/hardware/interfaces/+/refs/heads/android16-release/radio/aidl/android/hardware/radio/network/IRadioNetworkIndication.aidl#236)\n\nWhen enabled, users receive notifications as shown in the following\nfigures.\n\n### Unencrypted connection notification\n\nWhenever the device connects to an unencrypted network, the following\nnotifications appear so that users can take mitigating actions. Tapping the\nnotification takes the user to the Safety Center where they can view more\ndetails.\n\n**Figure 2.** Unencrypted network system notification and corresponding Safety\nCenter card.\n\n### Encrypted connection notification\n\nWhen the device connects to an encrypted network, the following notification\nappears:\n\n**Figure 3.** Encrypted network system notification and corresponding Safety\nCenter card.\n\n### Device identifier accessed notification\n\nWhenever the device exchanges device identifiers such as IMEI or IMSI with the\nnetwork, the following notification appears so that users can take mitigating\nactions. Tapping the notification takes the user to\nthe Safety Center where they can view more details.\n\n**Figure 4.** Device identifier system notification and corresponding Safety\nCenter card.\n| **Note:** Normal use of the device is also associated with limited or infrequent exchange of device identifiers with the network. However, these notifications are helpful if the device is frequently exchanging device identifiers that might be related to surveillance scenarios.\n\nNetwork generation\n------------------\n\nThis subsection contains additional entry points for 2G toggle for each of the\nSIMs in the device. Each 2G toggle enables or disables device's 2G\nconnectivity for the respective SIM. Each of these toggles reflect the\nsame state as their corresponding 2G toggle under **SIM Settings** in\n**Settings**.\n\n**Figure 5.** Additional entry points for the 2G toggle."]]