diff --git a/doc/ble.md b/doc/ble.md
index 89ad877f..8125e985 100644
--- a/doc/ble.md
+++ b/doc/ble.md
@@ -34,10 +34,14 @@ The following custom services are implemented in InfiniTime:
 
  - Since InfiniTime 0.11:
      * [Navigation Service](NavigationService.md) : 00010000-78fc-48fe-8e23-433b3a1942d0
+
+
+ - Since InfiniTime 0.13
+     * Call characteristic (extension to the Alert Notification Service): 00020001-78fc-48fe-8e23-433b3a1942d0
  
   
  - Since InfiniTime 1.7:
-   * [Motion Service](MotionService.md) :        00020000-78fc-48fe-8e23-433b3a1942d0
+   * [Motion Service](MotionService.md) :        00030000-78fc-48fe-8e23-433b3a1942d0
 
 ## BLE services
 [List of standard BLE services](https://www.bluetooth.com/specifications/gatt/services/)
diff --git a/src/components/ble/MotionService.cpp b/src/components/ble/MotionService.cpp
index 2bb5289c..e305021a 100644
--- a/src/components/ble/MotionService.cpp
+++ b/src/components/ble/MotionService.cpp
@@ -9,7 +9,7 @@ namespace {
   constexpr ble_uuid128_t CharUuid(uint8_t x, uint8_t y) {
     return ble_uuid128_t{
       .u = {.type = BLE_UUID_TYPE_128},
-      .value =  { 0xd0, 0x42, 0x19, 0x3a, 0x3b, 0x43, 0x23, 0x8e, 0xfe, 0x48, 0xfc, 0x78, x, y, 0x02, 0x00 }
+      .value =  { 0xd0, 0x42, 0x19, 0x3a, 0x3b, 0x43, 0x23, 0x8e, 0xfe, 0x48, 0xfc, 0x78, x, y, 0x03, 0x00 }
     };
   }