version: "1.0.4" name: aosp-connectivity description: | AOSP Part VIII — Connectivity. Use when reasoning about Networking (ConnectivityService, Wi-Fi framework, netd, DNS resolver, VPN, tethering, NetworkSecurityConfig, VCN, Thread mesh), Telephony (TelephonyManager, PhoneInterfaceManager, RIL/RILD, modem AIDL, IMS framework, emergency calling), Bluetooth (Bluetooth Mainline module, BTA, GATT, A2DP/HFP/AVDTP, LE Audio, pairing, scanning, advertising), NFC (NfcAdapter/NfcService, NCI, tag dispatch, HCE, secure element, reader mode, NFC-F/V), or USB & ADB (USB gadget framework, host-mode USB, MTP/PTP, RNDIS tethering, adb daemon, adb over Wi-Fi). Chapters 35–39. metadata: author: 'utzcoz' version: '2026.06.24' last-updated: '2026-09-12'

AOSP Part VIII — Connectivity

The radios, transports, and IPC stacks that move bits off the device: Wi-Fi, cellular, Bluetooth, NFC, and USB/ADB.

Chapters in this Part

• 35-networking.md — ConnectivityService, Wi-Fi framework, netd, DNS resolver, VPN, tethering, NetworkSecurityConfig, VCN, Thread mesh
• 36-telephony.md — TelephonyManager, PhoneInterfaceManager, RIL/RILD, modem AIDL, IMS framework, emergency calling, call routing
• 37-bluetooth.md — Bluetooth Mainline module, BTA layer, GATT, A2DP/HFP/AVDTP, LE Audio, pairing, scanning, advertising
• 38-nfc.md — NfcAdapter/NfcService, NCI, tag dispatch, HCE, secure element, reader mode, NFC-F (FeliCa) and NFC-V
• 39-usb-adb.md — USB gadget framework, host-mode USB, MTP/PTP, RNDIS tethering, adb daemon, adb over Wi-Fi, transports

When to load which chapter

• Question mentions ConnectivityService, Wi-Fi, netd, DNS, VPN, tethering, VCN, Thread → 35-networking.md
• Question mentions Telephony, modem, RIL, IMS, emergency call → 36-telephony.md
• Question mentions Bluetooth, BTA, GATT, A2DP, HFP, LE Audio, pairing → 37-bluetooth.md
• Question mentions NFC, NCI, HCE, tag dispatch, secure element → 38-nfc.md
• Question mentions USB gadget, MTP, RNDIS, adb, adb over Wi-Fi → 39-usb-adb.md