diff --git a/core/java/android/os/Build.java b/core/java/android/os/Build.java
index 2ad5da056659c..1ff248f20f0a8 100755
--- a/core/java/android/os/Build.java
+++ b/core/java/android/os/Build.java
@@ -141,8 +141,8 @@ public class Build {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index c7aaee1797c2d..85dca2b4e9b33 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -1884,8 +1884,8 @@ public class TelephonyManager {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.
@@ -1937,8 +1937,8 @@ public class TelephonyManager {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.
@@ -2006,8 +2006,8 @@ public class TelephonyManager {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.
@@ -2084,8 +2084,8 @@ public class TelephonyManager {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.
@@ -2122,8 +2122,8 @@ public class TelephonyManager {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.
@@ -2206,8 +2206,8 @@ public class TelephonyManager {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.
@@ -2243,8 +2243,8 @@ public class TelephonyManager {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.
@@ -3719,8 +3719,8 @@ public class TelephonyManager {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.
@@ -3757,8 +3757,8 @@ public class TelephonyManager {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.
@@ -4011,8 +4011,8 @@ public class TelephonyManager {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.
@@ -4050,8 +4050,8 @@ public class TelephonyManager {
      *
      * <p>Starting with API level 29, persistent device identifiers are guarded behind additional
      * restrictions, and apps are recommended to use resettable identifiers (see <a
-     * href="c"> Best practices for unique identifiers</a>). This method can be invoked if one of
-     * the following requirements is met:
+     * href="/training/articles/user-data-ids">Best practices for unique identifiers</a>). This
+     * method can be invoked if one of the following requirements is met:
      * <ul>
      *     <li>If the calling app has been granted the READ_PRIVILEGED_PHONE_STATE permission; this
      *     is a privileged permission that can only be granted to apps preloaded on the device.