diff --git a/app/src/app_basic_service/device_version_info_mgr.c b/app/src/app_basic_service/device_version_info_mgr.c
index 1444946..d7b66d6 100644
--- a/app/src/app_basic_service/device_version_info_mgr.c
+++ b/app/src/app_basic_service/device_version_info_mgr.c
@@ -15,7 +15,7 @@ static void fstorage_evt_handler(nrf_fstorage_evt_t *p_evt) {
 
   switch (p_evt->id) {
     case NRF_FSTORAGE_EVT_WRITE_RESULT: {
-      NRF_LOG_INFO("--> Event received: wrote %d bytes at address 0x%x.", p_evt->len, p_evt->addr);
+      NRF_LOG_INFO("--> Event received: wrote %d bytes at address 0x%x. %x", p_evt->len, p_evt->addr,*(uint32_t*)p_evt->p_src);
     } break;
 
     case NRF_FSTORAGE_EVT_ERASE_RESULT: {
@@ -74,12 +74,21 @@ uint16_t device_info_read_firmware_version(void) { return FIRMWARE_VERSION; }
 uint16_t device_info_read_hardware_version(void) { return HARDWARE_VERSION; }
 
 void device_info_write_active_flag(bool val) {
-  uint32_t data = 0x12345678;
-  nrf_fstorage_write(&fstorage, fstorage.start_addr, &data, sizeof(data), NULL);
+  static uint32_t data = 0x12345678;
+  if (val) {
+    data = 0x12345678;
+  } else {
+    data = 0;
+  }
+  ret_code_t ecode =  nrf_fstorage_write(&fstorage, fstorage.start_addr, &data, sizeof(data), NULL);
+  if (ecode != NRF_SUCCESS) {
+    NRF_LOG_INFO("write active flag failed");
+  }
 }
 bool device_info_get_active_flag() {
   uint32_t data;
   nrf_fstorage_read(&fstorage, fstorage.start_addr, &data, sizeof(data));
+  // ZLOGI("active flag: %x", data);
   if (data != 0x12345678) {
     return false;
   } else {