[ Transfer BLE data  ](/develop/connectivity/bluetooth/ble/transfer-ble-data)

    * BLE Audio 

      * [ About BLE Audio support  ](/develop/connectivity/bluetooth/ble-audio/overview)
      * [ Use Audio Manager self-managed calls  ](/develop/connectivity/bluetooth/ble-audio/audio-manager)
      * [ Manage calls using the Telecom API  ](/develop/connectivity/bluetooth/ble-audio/telecom-api-managed-calls)
      * [ Set up audio recording  ](/develop/connectivity/bluetooth/ble-audio/audio-recording)

  * Near Field Communication (NFC) 

    * [ About NFC support  ](/develop/connectivity/nfc)
    * [ NFC basics  ](/develop/connectivity/nfc/nfc)
    * [ Advanced NFC  ](/develop/connectivity/nfc/advanced-nfc)
    * [ About host-based card emulation  ](/develop/connectivity/nfc/hce)

  * USB 

    * [ USB host and accessory overview  ](/develop/connectivity/usb)
    * [ Learn about USB accessories  ](/develop/connectivity/usb/accessory)
    * [ Connect to USB hosts  ](/develop/connectivity/usb/host)

  * Telecom 

    * [ About telecom  ](/develop/connectivity/telecom)
    * Dialer Application 

      * [ Building a default phone application  ](/develop/connectivity/telecom/dialer-app)
      * [ Prevent caller ID spoofing  ](/develop/connectivity/telecom/dialer-app/prevent-spoofing)
      * [ Detect eSIMs and SIM cards  ](/develop/connectivity/telecom/dialer-app/telephony-ids)
      * [ Redirect a call  ](/develop/connectivity/telecom/dialer-app/redirect-a-call)
      * [ Screen calls  ](/develop/connectivity/telecom/dialer-app/screen-calls)

    * Build a calling application 

      * [ Overview  ](/develop/connectivity/telecom/voip-app)
      * [ Telecom  ](/develop/connectivity/telecom/voip-app/telecom)
      * [ Call notifications  ](/develop/connectivity/telecom/voip-app/notifications)

  * [ Ultra-wideband (UWB) communication  ](/develop/connectivity/uwb)
  * Optimize your app for connectivity 

  * Reduce network battery drainage 

    * [ About preserving battery  ](/develop/connectivity/preserving-battery)
    * [ Avoid unoptimized downloads  ](/develop/connectivity/avoid-unoptimized-downloads)
    * [ Minimize the effect of regular updates  ](/develop/connectivity/minimize-effect-regular-updates)
    * [ Troubleshoot network issues  ](/develop/connectivity/troubleshoot-network-issues)

  * Use Cronet to reduce latency and increase network throughput 

    * [ About Cronet capabilities  ](/develop/connectivity/cronet)
    * [ Send a simple request  ](/develop/connectivity/cronet/start)
    * [ About the Cronet request lifecycle  ](/develop/connectivity/cronet/lifecycle)
    * [ Use Cronet with other libraries  ](/develop/connectivity/cronet/integration)

  * Modern Android 
  * [ Explore Modern Android  ](/modern-android-development)
  * [ Adopt Compose for teams  ](/jetpack/compose/adopt)
  * Get started 
  * [ Hello world  ](/codelabs/basic-android-kotlin-compose-first-app)
  * [ Training courses  ](/courses)
  * [ Tutorials  ](/get-started/codelabs)
  * [ Kotlin for Android  ](/kotlin)
  * [ Monetization with Play ↗️  ](https://play.google.com/console/about/guides/monetize/)
  * Extend by device 
  * [ Large screens (e.g. Tablets)  ](/large-screens)
  * [ Wear OS  ](/wear)
  * [ Android for Cars  ](/cars)
  * [ Android TV  ](/tv)
  * [ ChromeOS  ](/chrome-os)
  * [ Cross-device SDK  ](/guide/topics/connectivity/cross-device-sdk/overview)
  * Build by category 
  * [ Games  ](/games)
  * [ Media apps  ](/media)
  * [ Health & Fitness  ](/health-and-fitness)
  * [ Enterprise apps  ](/work/overview)
  * Get the latest 
  * [ Platform releases  ](/about/versions)
  * [ Android Studio preview  ](/studio/preview)
  * [ Jetpack & Compose libraries  ](/jetpack/androidx/versions)
  * [ Wear OS preview  ](/training/wearables/versions/4)
  * [ Privacy Sandbox  ](/design-for-safety/privacy-sandbox)

  * Kits & more 
  * [ Go to Android & Material kits  ](/design/ui/mobile#explore-our-kits)
  * [ Go to Wear OS kits  ](/design/ui/w