Unable to scan for other Android phones

I’ve successfully used this library for scanning some hardware devices (BT chips ESP32, Sierra Wireless, etc.). But, I’m unable to detect other Android phones (that have Bluetooth and Location enabled).

Is there any specific configuration necessary to be added, or this is not possible to be achieved?

This is my implementation:

public synchronized void startScan() {
		final ScanSettings settings = new ScanSettings.Builder().setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)
			.setReportDelay(1000)
			.setUseHardwareBatchingIfSupported(false)
			.build();
		
		BluetoothLeScannerCompat scanner = BluetoothLeScannerCompat.getScanner();
		try {
			scanner.startScan(null, settings, scanCallback);
			Log.d(LOG_TAG, "BLE start scan.");
		} catch (IllegalArgumentException e) {
			Log.d(LOG_TAG, e.getMessage());
		}
	}

Thanks!

[philips77]

On the other hand, iOS devices do advertise without any app, as they use it for AirDrop. Apps can customize and add their data to the packet, but even without them the phone will advertise. Same with Macs with support for BLE.

[philips77]

Yes, you need to advertise in an app. We recommend nRF Connect for Android, available on Google Play, where you can customize the advertising packet in UI.