Deviceid function of the phone manager extension no longer returns the id

[Taifun]

@Carlos_Andre

I need to read the serial number.

it is unfortunately not possible anymore starting from Android 10
see here why https://developer.android.com/about/versions/10/privacy/changes
Taifun

Restriction on non-resettable device identifiers

Starting in Android 10, apps must have the READ_PRIVILEGED_PHONE_STATE privileged permission in order to access the device's non-resettable identifiers, which include both IMEI and serial number.

Caution: Third-party apps installed from the Google Play Store cannot declare privileged permissions.

Affected methods include the following:

• Build
  • getSerial()
• TelephonyManager
  • getImei()
  • getDeviceId()
  • getMeid()
  • getSimSerialNumber()
  • getSubscriberId()

If your app doesn't have the permission and you try asking for information about non-resettable identifiers anyway, the platform's response varies based on target SDK version:

• If your app targets Android 10 or higher, a SecurityException occurs.
• If your app targets Android 9 (API level 28) or lower, the method returns null or placeholder data if the app has the READ_PHONE_STATE permission. Otherwise, a SecurityException occurs.