diff --git a/lib/ShortDev.Microsoft.ConnectedDevices.NearShare/NearShareSender.cs b/lib/ShortDev.Microsoft.ConnectedDevices.NearShare/NearShareSender.cs
index 05f3074..68b4331 100644
--- a/lib/ShortDev.Microsoft.ConnectedDevices.NearShare/NearShareSender.cs
+++ b/lib/ShortDev.Microsoft.ConnectedDevices.NearShare/NearShareSender.cs
@@ -4,6 +4,7 @@
 using ShortDev.Microsoft.ConnectedDevices.NearShare.Apps;
 using ShortDev.Microsoft.ConnectedDevices.NearShare.Messages;
 using ShortDev.Microsoft.ConnectedDevices.Serialization;
+using ShortDev.Microsoft.ConnectedDevices.Transports;
 using System.Buffers;
 using System.Diagnostics;
 
@@ -13,9 +14,11 @@ public sealed class NearShareSender(ConnectedDevicesPlatform platform)
 {
     public ConnectedDevicesPlatform Platform { get; } = platform;
 
+    public event EventHandler<CdpTransportType>? TransportUpgraded;
+
     async Task<SenderStateMachine> PrepareTransferInternalAsync(EndpointInfo endpoint, CancellationToken cancellationToken)
     {
-        var session = await Platform.ConnectAsync(endpoint);
+        var session = await Platform.ConnectAsync(endpoint, options: new() { TransportUpgraded = TransportUpgraded });
 
         Guid operationId = Guid.NewGuid();
 
diff --git a/lib/ShortDev.Microsoft.ConnectedDevices/CdpLog.cs b/lib/ShortDev.Microsoft.ConnectedDevices/CdpLog.cs
index 0a54c88..e43139e 100644
--- a/lib/ShortDev.Microsoft.ConnectedDevices/CdpLog.cs
+++ b/lib/ShortDev.Microsoft.ConnectedDevices/CdpLog.cs
@@ -1,5 +1,6 @@
 using Microsoft.Extensions.Logging;
 using ShortDev.Microsoft.ConnectedDevices.Messages.Connection;
+using ShortDev.Microsoft.ConnectedDevices.Messages.Connection.TransportUpgrade;
 using ShortDev.Microsoft.ConnectedDevices.Messages.Control;
 using ShortDev.Microsoft.ConnectedDevices.Transports;
 
@@ -71,4 +72,10 @@ internal static partial class CdpLog
 
     [LoggerMessage(EventId = 304, Level = LogLevel.Warning, Message = "Upgrade failed")]
     public static partial void UpgradeFailed(this ILogger logger, Exception ex);
+
+    [LoggerMessage(EventId = 305, Level = LogLevel.Debug, Message = "Sending upgrade request {UpgradeId} to {UpgradeTypes}")]
+    public static partial void SendingUpgradeRequest(this ILogger logger, Guid upgradeId, IEnumerable<EndpointMetadata> upgradeTypes);
+
+    [LoggerMessage(EventId = 306, Level = LogLevel.Debug, Message = "Upgrade response {UpgradeId} to {Endpoints}")]
+    public static partial void UpgradeResponse(this ILogger logger, Guid upgradeId, IEnumerable<EndpointInfo> endpoints);
 }
diff --git a/lib/ShortDev.Microsoft.ConnectedDevices/CdpSession.cs b/lib/ShortDev.Microsoft.ConnectedDevices/CdpSession.cs
index 6c689fd..9413002 100644
--- a/lib/ShortDev.Microsoft.ConnectedDevices/CdpSession.cs
+++ b/lib/ShortDev.Microsoft.ConnectedDevices/CdpSession.cs
@@ -72,7 +72,7 @@ internal static CdpSession GetOrCreate(ConnectedDevicesPlatform platform, Endpoi
         ), out _);
     }
 
-    internal static async Task<CdpSession> ConnectClientAsync(ConnectedDevicesPlatform platform, CdpSocket socket)
+    internal static async Task<CdpSession> ConnectClientAsync(ConnectedDevicesPlatform platform, CdpSocket socket, ConnectOptions? options = null)
     {
         var session = _sessionRegistry.Create(localSessionId => new(
             platform,
@@ -81,6 +81,10 @@ internal static async Task<CdpSession> ConnectClientAsync(ConnectedDevicesPlatfo
         ), out _);
 
         var connectHandler = (ClientConnectHandler)session._connectHandler;
+
+        if (options is not null)
+            connectHandler.UpgradeHandler.Upgraded += options.TransportUpgraded;
+
         await connectHandler.ConnectAsync(socket);
 
         return session;
diff --git a/lib/ShortDev.Microsoft.ConnectedDevices/ConnectOptions.cs b/lib/ShortDev.Microsoft.ConnectedDevices/ConnectOptions.cs
new file mode 100644
index 0000000..3b2998c
--- /dev/null
+++ b/lib/ShortDev.Microsoft.ConnectedDevices/ConnectOptions.cs
@@ -0,0 +1,8 @@
+using ShortDev.Microsoft.ConnectedDevices.Transports;
+
+namespace ShortDev.Microsoft.ConnectedDevices;
+
+public record ConnectOptions
+{
+    public EventHandler<CdpTransportType>? TransportUpgraded { get; init; }
+}
diff --git a/lib/ShortDev.Microsoft.ConnectedDevices/ConnectedDevicesPlatform.cs b/lib/ShortDev.Microsoft.ConnectedDevices/ConnectedDevicesPlatform.cs
index 64adb3f..8610ef1 100644
--- a/lib/ShortDev.Microsoft.ConnectedDevices/ConnectedDevicesPlatform.cs
+++ b/lib/ShortDev.Microsoft.ConnectedDevices/ConnectedDevicesPlatform.cs
@@ -140,10 +140,10 @@ await Task.WhenAll(_transportMap.Values
         }
     }
 
-    public async Task<CdpSession> ConnectAsync([NotNull] EndpointInfo endpoint)
+    public async Task<CdpSession> ConnectAsync([NotNull] EndpointInfo endpoint, ConnectOptions? options = null)
     {
         var socket = await CreateSocketAsync(endpoint).ConfigureAwait(false);
-        return await CdpSession.ConnectClientAsync(this, socket).ConfigureAwait(false);
+        return await CdpSession.ConnectClientAsync(this, socket, options).ConfigureAwait(false);
     }
 
     internal async Task<CdpSocket> CreateSocketAsync(EndpointInfo endpoint)
diff --git a/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/EndpointMetadata.cs b/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/EndpointMetadata.cs
index f836283..44bbcd5 100644
--- a/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/EndpointMetadata.cs
+++ b/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/EndpointMetadata.cs
@@ -15,7 +15,7 @@ public static EndpointMetadata Parse(ref EndianReader reader)
         return new(type, data.ToArray());
     }
 
-    public static EndpointMetadata[] ParseArray(ref EndianReader reader)
+    public static IReadOnlyList<EndpointMetadata> ParseArray(ref EndianReader reader)
     {
         var arrayLength = reader.ReadUInt16();
         var endpoints = new EndpointMetadata[arrayLength];
@@ -31,9 +31,9 @@ public void Write(EndianWriter writer)
         writer.Write(Data);
     }
 
-    public static void WriteArray(EndianWriter writer, EndpointMetadata[] endpoints)
+    public static void WriteArray(EndianWriter writer, IReadOnlyList<EndpointMetadata> endpoints)
     {
-        writer.Write((ushort)endpoints.Length);
+        writer.Write((ushort)endpoints.Count);
         foreach (var endpoint in endpoints)
             endpoint.Write(writer);
     }
diff --git a/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/UpgradeRequest.cs b/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/UpgradeRequest.cs
index 1f2c0ec..f1d11ec 100644
--- a/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/UpgradeRequest.cs
+++ b/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/UpgradeRequest.cs
@@ -9,7 +9,7 @@ public sealed class UpgradeRequest : ICdpPayload<UpgradeRequest>
     /// A random GUID identifying this upgrade process across transports.
     /// </summary>
     public required Guid UpgradeId { get; init; }
-    public required EndpointMetadata[] Endpoints { get; init; }
+    public required IReadOnlyList<EndpointMetadata> Endpoints { get; init; }
 
     public static UpgradeRequest Parse(ref EndianReader reader)
         => new()
diff --git a/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/UpgradeResponse.cs b/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/UpgradeResponse.cs
index 0e3cde8..8f04d51 100644
--- a/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/UpgradeResponse.cs
+++ b/lib/ShortDev.Microsoft.ConnectedDevices/Messages/Connection/TransportUpgrade/UpgradeResponse.cs
@@ -10,8 +10,8 @@ public sealed class UpgradeResponse : ICdpPayload<UpgradeResponse>
     /// <summary>
     /// A length-prefixed list of endpoint structures (see following) that are provided by each transport on the host device.
     /// </summary>
-    public required EndpointInfo[] Endpoints { get; init; }
-    public required EndpointMetadata[] MetaData { get; init; }
+    public required IReadOnlyList<EndpointInfo> Endpoints { get; init; }
+    public required IReadOnlyList<EndpointMetadata> MetaData { get; init; }
 
     public static UpgradeResponse Parse(ref EndianReader reader)
     {
@@ -37,7 +37,7 @@ public static UpgradeResponse Parse(ref EndianReader reader)
 
     public void Write(EndianWriter writer)
     {
-        writer.Write((ushort)Endpoints.Length);
+        writer.Write((ushort)Endpoints.Count);
         foreach (var endpoint in Endpoints)
         {
             writer.WriteWithLength(endpoint.Address);
diff --git a/lib/ShortDev.Microsoft.ConnectedDevices/Messages/ICdpSerializable.cs b/lib/ShortDev.Microsoft.ConnectedDevices/Messages/ICdpSerializable.cs
index de30d98..af68317 100644
--- a/lib/ShortDev.Microsoft.ConnectedDevices/Messages/ICdpSerializable.cs
+++ b/lib/ShortDev.Microsoft.ConnectedDevices/Messages/ICdpSerializable.cs
@@ -16,8 +16,8 @@ public long CalcSize()
 
 public interface ICdpArraySerializable<T> where T : ICdpArraySerializable<T>
 {
-    static abstract T[] ParseArray(ref EndianReader reader);
-    static abstract void WriteArray(EndianWriter writer, T[] array);
+    static abstract IReadOnlyList<T> ParseArray(ref EndianReader reader);
+    static abstract void WriteArray(EndianWriter writer, IReadOnlyList<T> array);
 }
 
 public interface ICdpWriteable
diff --git a/lib/ShortDev.Microsoft.ConnectedDevices/Session/Upgrade/ClientUpgradeHandler.cs b/lib/ShortDev.Microsoft.ConnectedDevices/Session/Upgrade/ClientUpgradeHandler.cs
index 7835f73..ee79628 100644
--- a/lib/ShortDev.Microsoft.ConnectedDevices/Session/Upgrade/ClientUpgradeHandler.cs
+++ b/lib/ShortDev.Microsoft.ConnectedDevices/Session/Upgrade/ClientUpgradeHandler.cs
@@ -1,4 +1,5 @@
-using ShortDev.Microsoft.ConnectedDevices.Messages;
+using Microsoft.Extensions.Logging;
+using ShortDev.Microsoft.ConnectedDevices.Messages;
 using ShortDev.Microsoft.ConnectedDevices.Messages.Connection;
 using ShortDev.Microsoft.ConnectedDevices.Messages.Connection.TransportUpgrade;
 using ShortDev.Microsoft.ConnectedDevices.Transports;
@@ -8,6 +9,8 @@
 namespace ShortDev.Microsoft.ConnectedDevices.Session.Upgrade;
 internal sealed class ClientUpgradeHandler(CdpSession session, EndpointInfo initialEndpoint) : UpgradeHandler(session, initialEndpoint)
 {
+    private readonly ILogger _logger = session.Platform.CreateLogger<ClientUpgradeHandler>();
+
     protected override bool TryHandleConnectInternal(CdpSocket socket, ConnectionHeader connectionHeader, ref EndianReader reader)
     {
         if (!IsSocketAllowed(socket))
@@ -34,6 +37,8 @@ protected override bool TryHandleConnectInternal(CdpSocket socket, ConnectionHea
         return false;
     }
 
+    static readonly IReadOnlyList<EndpointMetadata> UpgradeEndpoints = [EndpointMetadata.Tcp];
+
     UpgradeInstance? _currentUpgrade;
     public async ValueTask<CdpSocket> RequestUpgradeAsync(CdpSocket oldSocket)
     {
@@ -43,7 +48,8 @@ public async ValueTask<CdpSocket> RequestUpgradeAsync(CdpSocket oldSocket)
         _currentUpgrade = new();
         try
         {
-            SendUpgradeRequest(oldSocket, _currentUpgrade.Id);
+            _logger.SendingUpgradeRequest(_currentUpgrade.Id, UpgradeEndpoints);
+            SendUpgradeRequest(oldSocket, _currentUpgrade.Id, UpgradeEndpoints);
             return await _currentUpgrade.Promise.Task;
         }
         finally
@@ -51,7 +57,7 @@ public async ValueTask<CdpSocket> RequestUpgradeAsync(CdpSocket oldSocket)
             _currentUpgrade = null;
         }
 
-        void SendUpgradeRequest(CdpSocket socket, Guid upgradeId)
+        void SendUpgradeRequest(CdpSocket socket, Guid upgradeId, IReadOnlyList<EndpointMetadata> endpoints)
         {
             CommonHeader header = new()
             {
@@ -68,10 +74,7 @@ void SendUpgradeRequest(CdpSocket socket, Guid upgradeId)
             new UpgradeRequest()
             {
                 UpgradeId = upgradeId,
-                Endpoints =
-                [
-                    EndpointMetadata.Tcp
-                ]
+                Endpoints = endpoints
             }.Write(writer);
 
             _session.SendMessage(socket, header, writer);
@@ -84,6 +87,8 @@ void HandleUpgradeResponse(CdpSocket oldSocket, ref EndianReader reader)
             return;
 
         var msg = UpgradeResponse.Parse(ref reader);
+        _logger.UpgradeResponse(_currentUpgrade.Id, msg.Endpoints);
+
         FindNewEndpoint();
 
         async void FindNewEndpoint()
diff --git a/lib/ShortDev.Microsoft.ConnectedDevices/Session/Upgrade/UpgradeHandler.cs b/lib/ShortDev.Microsoft.ConnectedDevices/Session/Upgrade/UpgradeHandler.cs
index 80b912d..0436100 100644
--- a/lib/ShortDev.Microsoft.ConnectedDevices/Session/Upgrade/UpgradeHandler.cs
+++ b/lib/ShortDev.Microsoft.ConnectedDevices/Session/Upgrade/UpgradeHandler.cs
@@ -13,7 +13,18 @@ internal abstract class UpgradeHandler(CdpSession session, EndpointInfo initialE
     public bool IsSocketAllowed(CdpSocket socket)
         => _allowedAddresses.Contains(socket.Endpoint.Address);
 
-    public EndpointInfo RemoteEndpoint { get; protected set; } = initialEndpoint;
+    public event EventHandler<CdpTransportType>? Upgraded;
+
+    EndpointInfo _remoteEndpoint = initialEndpoint;
+    public EndpointInfo RemoteEndpoint
+    {
+        get => _remoteEndpoint;
+        protected set
+        {
+            _remoteEndpoint = value;
+            Upgraded?.Invoke(this, value.TransportType);
+        }
+    }
 
     public bool IsUpgradeSupported
         => (/* ToDo: header131Value & */ _session.ClientCapabilities & _session.HostCapabilities & PeerCapabilities.UpgradeSupport) != 0;
diff --git a/src/SendActivity.cs b/src/SendActivity.cs
index 471cae9..b8a9e93 100644
--- a/src/SendActivity.cs
+++ b/src/SendActivity.cs
@@ -30,7 +30,7 @@ namespace NearShare.Droid;
 [Activity(Label = "@string/app_name", Exported = true, Theme = "@style/AppTheme.TranslucentOverlay", ConfigurationChanges = UIHelper.ConfigChangesFlags)]
 public sealed class SendActivity : AppCompatActivity
 {
-    NearShareSender NearShareSender = null!;
+    NearShareSender _nearShareSender = null!;
 
     BottomSheetDialog _dialog = null!;
     RecyclerView DeviceDiscoveryListView = null!;
@@ -78,13 +78,7 @@ protected override void OnCreate(Bundle? savedInstanceState)
                 view.FindViewById<ImageView>(Resource.Id.deviceTypeImageView)!.SetImageResource(
                     device.Type.IsMobile() ? Resource.Drawable.ic_fluent_phone_24_regular : Resource.Drawable.ic_fluent_desktop_24_regular
                 );
-                view.FindViewById<ImageView>(Resource.Id.transportTypeImageView)!.SetImageResource(device.Endpoint.TransportType switch
-                {
-                    CdpTransportType.Tcp => Resource.Drawable.ic_fluent_wifi_1_20_regular,
-                    CdpTransportType.Rfcomm => Resource.Drawable.ic_fluent_bluetooth_20_regular,
-                    CdpTransportType.WifiDirect => Resource.Drawable.ic_fluent_live_20_regular,
-                    _ => Resource.Drawable.ic_fluent_question_circle_20_regular
-                });
+                view.FindViewById<ImageView>(Resource.Id.transportTypeImageView)!.SetImageResource(GetTransportIcon(device.Endpoint.TransportType));
                 view.FindViewById<TextView>(Resource.Id.deviceNameTextView)!.Text = device.Name;
                 view.Click += (s, e) => SendData(device);
             }
@@ -137,7 +131,7 @@ void InitializePlatform()
         _cdp.DeviceDiscovered += Platform_DeviceDiscovered;
         _cdp.Discover(_discoverCancellationTokenSource.Token);
 
-        NearShareSender = new NearShareSender(_cdp);
+        _nearShareSender = new NearShareSender(_cdp);
     }
 
     readonly ObservableCollection<CdpDevice> RemoteSystems = [];
@@ -190,13 +184,10 @@ private async void SendData(CdpDevice remoteSystem)
         sendingDataLayout.FindViewById<ImageView>(Resource.Id.deviceTypeImageView)!.SetImageResource(
             remoteSystem.Type.IsMobile() ? Resource.Drawable.ic_fluent_phone_24_regular : Resource.Drawable.ic_fluent_desktop_24_regular
         );
-        sendingDataLayout.FindViewById<ImageView>(Resource.Id.transportTypeImageView)!.SetImageResource(remoteSystem.Endpoint.TransportType switch
-        {
-            CdpTransportType.Tcp => Resource.Drawable.ic_fluent_wifi_1_20_regular,
-            CdpTransportType.Rfcomm => Resource.Drawable.ic_fluent_bluetooth_20_regular,
-            CdpTransportType.WifiDirect => Resource.Drawable.ic_fluent_live_20_regular,
-            _ => Resource.Drawable.ic_fluent_question_circle_20_regular
-        });
+
+        var transportTypeImage = sendingDataLayout.FindViewById<ImageView>(Resource.Id.transportTypeImageView)!;
+        transportTypeImage.SetImageResource(GetTransportIcon(remoteSystem.Endpoint.TransportType));
+        _nearShareSender.TransportUpgraded += OnTransportUpgrade;
 
         var deviceNameTextView = sendingDataLayout.FindViewById<TextView>(Resource.Id.deviceNameTextView)!;
         var progressIndicator = sendingDataLayout.FindViewById<CircularProgressIndicator>(Resource.Id.sendProgressIndicator)!;
@@ -220,7 +211,7 @@ private async void SendData(CdpDevice remoteSystem)
             if (files != null)
             {
                 progress = new();
-                transferPromise = NearShareSender.SendFilesAsync(
+                transferPromise = _nearShareSender.SendFilesAsync(
                     remoteSystem,
                     files,
                     progress,
@@ -229,7 +220,7 @@ private async void SendData(CdpDevice remoteSystem)
             }
             else if (uri != null)
             {
-                transferPromise = NearShareSender.SendUriAsync(
+                transferPromise = _nearShareSender.SendUriAsync(
                     remoteSystem,
                     uri
                 );
@@ -308,6 +299,15 @@ private async void SendData(CdpDevice remoteSystem)
 
             progressIndicator.Indeterminate = false;
             progressIndicator.Progress = progressIndicator.Max;
+
+            _nearShareSender.TransportUpgraded -= OnTransportUpgrade;
+        }
+
+        void OnTransportUpgrade(object? sender, CdpTransportType transportType)
+        {
+            RunOnUiThread(() =>
+                transportTypeImage.SetImageResource(GetTransportIcon(transportType))
+            );
         }
     }
 
@@ -386,6 +386,17 @@ public override void Finish()
         _cdp?.Dispose();
     }
 
+    static int GetTransportIcon(CdpTransportType transportType)
+    {
+        return transportType switch
+        {
+            CdpTransportType.Tcp => Resource.Drawable.ic_fluent_wifi_1_20_regular,
+            CdpTransportType.Rfcomm => Resource.Drawable.ic_fluent_bluetooth_20_regular,
+            CdpTransportType.WifiDirect => Resource.Drawable.ic_fluent_live_20_regular,
+            _ => Resource.Drawable.ic_fluent_question_circle_20_regular
+        };
+    }
+
     sealed class FinishActivityBottomSheetCallback(Activity activity) : BottomSheetBehavior.BottomSheetCallback
     {
         public override void OnSlide(View bottomSheet, float newState) { }