diff --git a/internal/provider/jazz/api.go b/internal/provider/jazz/api.go
index 811c2c0..cff9040 100644
--- a/internal/provider/jazz/api.go
+++ b/internal/provider/jazz/api.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"net/http"
 
@@ -19,6 +20,11 @@ type RoomInfo struct {
 	ConnectorURL string `json:"connectorUrl"`
 }
 
+var (
+	errCreateRoomFailed = errors.New("create room failed")
+	errPreconnectFailed = errors.New("preconnect failed")
+)
+
 func createRoom(ctx context.Context) (*RoomInfo, error) {
 	clientID := uuid.New().String()
 	headers := map[string]string{
@@ -60,10 +66,10 @@ func createRoom(ctx context.Context) (*RoomInfo, error) {
 	if err != nil {
 		return nil, fmt.Errorf("do create request: %w", err)
 	}
-	defer resp.Body.Close()
+	defer func() { _ = resp.Body.Close() }()
 
 	if resp.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("create room failed: status %d", resp.StatusCode)
+		return nil, fmt.Errorf("%w: status %d", errCreateRoomFailed, resp.StatusCode)
 	}
 
 	var createResp struct {
@@ -111,10 +117,10 @@ func createRoom(ctx context.Context) (*RoomInfo, error) {
 	if err != nil {
 		return nil, fmt.Errorf("do preconnect request: %w", err)
 	}
-	defer preResp.Body.Close()
+	defer func() { _ = preResp.Body.Close() }()
 
 	if preResp.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("preconnect failed: status %d", preResp.StatusCode)
+		return nil, fmt.Errorf("%w: status %d", errPreconnectFailed, preResp.StatusCode)
 	}
 
 	var preconnectResp struct {
@@ -178,10 +184,10 @@ func joinRoom(ctx context.Context, roomID, password string) (*RoomInfo, error) {
 	if err != nil {
 		return nil, fmt.Errorf("do preconnect request: %w", err)
 	}
-	defer preResp.Body.Close()
+	defer func() { _ = preResp.Body.Close() }()
 
 	if preResp.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("preconnect failed: status %d", preResp.StatusCode)
+		return nil, fmt.Errorf("%w: status %d", errPreconnectFailed, preResp.StatusCode)
 	}
 
 	var preconnectResp struct {
diff --git a/internal/provider/jazz/peer.go b/internal/provider/jazz/peer.go
index 2df7c7d..bded09f 100644
--- a/internal/provider/jazz/peer.go
+++ b/internal/provider/jazz/peer.go
@@ -41,11 +41,11 @@ type Peer struct {
 	sendQueueClosed atomic.Bool
 	onEnded         func(string)
 	sessionCloseCh  chan struct{}
-	sessionMu       sync.Mutex
 	wg              sync.WaitGroup
 	groupID         string
 }
 
+// NewPeer creates a new Jazz provider peer.
 func NewPeer(ctx context.Context, roomID, name string, onData func([]byte)) (*Peer, error) {
 	var roomInfo *RoomInfo
 	var err error
diff --git a/internal/server/server.go b/internal/server/server.go
index 08058ed..c9d13b6 100644
--- a/internal/server/server.go
+++ b/internal/server/server.go
@@ -184,7 +184,13 @@ func (s *Server) setupMux() {
 	})
 }
 
-func (s *Server) addPeer(ctx context.Context, providerName, roomURL string, peerID int, cancel context.CancelFunc) error {
+func (s *Server) addPeer(
+	ctx context.Context,
+	providerName,
+	roomURL string,
+	peerID int,
+	cancel context.CancelFunc,
+) error {
 	peer, err := provider.New(ctx, providerName, provider.Config{
 		RoomURL:   roomURL,
 		Name:      names.Generate(),
diff --git a/mobile/mobile.go b/mobile/mobile.go
index bda9ecb..b636113 100644
--- a/mobile/mobile.go
+++ b/mobile/mobile.go
@@ -108,6 +108,7 @@ func Start(roomID, keyHex string, socksPort int, socksUser, socksPass string) er
 
 		err := client.RunWithReady(
 			ctx,
+			"telemost",
 			roomURL,
 			keyHex,
 			socksPort,