diff --git a/project/ble_peripheral/ble_app_bladder_patch/main.c b/project/ble_peripheral/ble_app_bladder_patch/main.c
index 3b538f8..10b6890 100644
--- a/project/ble_peripheral/ble_app_bladder_patch/main.c
+++ b/project/ble_peripheral/ble_app_bladder_patch/main.c
@@ -121,7 +121,7 @@
  * 빌드 설정
  * DEBUG_MINIMAL_BOOT 삭제 26.03.26 jhChun
  *============================================================================*/
-#define BLE_DEV_MODE        0   /* 1: 개발 모드 (보안 없음), 0: 양산 모드 (패스키 필수) */
+#define BLE_DEV_MODE        1   /* 1: 개발 모드 (보안 없음), 0: 양산 모드 (패스키 필수) */
 
 /*==============================================================================
  * 하드웨어 핀 정의
@@ -1039,10 +1039,20 @@ static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
             APP_ERROR_CHECK(err_code);
             
             sd_ble_gap_tx_power_set(BLE_GAP_TX_POWER_ROLE_CONN, m_conn_handle, 8);
-            
+
+            // 2M PHY 요청 (지원 안 되면 자동으로 1M 유지)
+            {
+                ble_gap_phys_t const phys = {
+                    .rx_phys = BLE_GAP_PHY_2MBPS,
+                    .tx_phys = BLE_GAP_PHY_2MBPS,
+                };
+                err_code = sd_ble_gap_phy_update(m_conn_handle, &phys);
+                APP_ERROR_CHECK(err_code);
+            }
+
             err_code = bsp_indication_set(BSP_INDICATE_CONNECTED);
             APP_ERROR_CHECK(err_code);
-            
+
             break;
 
         case BLE_GAP_EVT_PHY_UPDATE_REQUEST:
@@ -1056,6 +1066,15 @@ static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context)
         }
         break;
 
+        case BLE_GAP_EVT_PHY_UPDATE:
+        {
+            ble_gap_evt_phy_update_t const * p_phy = &p_ble_evt->evt.gap_evt.params.phy_update;
+            DBG_PRINTF("[BLE] PHY updated: TX=%s, RX=%s\r\n",
+                p_phy->tx_phy == BLE_GAP_PHY_2MBPS ? "2M" : "1M",
+                p_phy->rx_phy == BLE_GAP_PHY_2MBPS ? "2M" : "1M");
+        }
+        break;
+
         case BLE_GATTC_EVT_TIMEOUT:
         case BLE_GATTS_EVT_TIMEOUT:
             DBG_PRINTF("[BLE] Timeout\r\n");