diff --git a/Android/MMKV/gradle.properties b/Android/MMKV/gradle.properties
index 8f57db47..c20c7504 100644
--- a/Android/MMKV/gradle.properties
+++ b/Android/MMKV/gradle.properties
@@ -14,6 +14,6 @@ org.gradle.jvmargs=-Xmx1536m
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 
-VERSION_NAME_PREFIX=1.2.9
+VERSION_NAME_PREFIX=1.2.10
 #VERSION_NAME_SUFFIX=-SNAPSHOT
 VERSION_NAME_SUFFIX=
\ No newline at end of file
diff --git a/Android/MMKV/mmkvdemo/build.gradle b/Android/MMKV/mmkvdemo/build.gradle
index 4a18eebf..5363bdad 100644
--- a/Android/MMKV/mmkvdemo/build.gradle
+++ b/Android/MMKV/mmkvdemo/build.gradle
@@ -75,8 +75,8 @@ repositories {
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation project(':mmkv')
-//    implementation 'com.tencent:mmkv:1.2.9'
-//    implementation 'com.tencent:mmkv-static:1.2.9'
+//    implementation 'com.tencent:mmkv:1.2.10'
+//    implementation 'com.tencent:mmkv-static:1.2.10'
     implementation 'androidx.appcompat:appcompat:1.3.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
     testImplementation 'junit:junit:4.13.2'
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0be4736f..87e201ff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,18 @@
 # MMKV Change Log
 
+## v1.2.10 / 2021-06-25
+This version is mainly for Android & Flutter.  
+
+### Android
+* Complete **JavaDoc documentation** for all public methods, classes, and interfaces. From now on, you can find the [API reference online](https://javadoc.io/doc/com.tencent/mmkv).
+* Drop the support of **armeabi** arch. Due to some local build cache mistake, the last version (v1.2.9) of MMKV still has an unstripped armeabi arch inside. This is fixed.
+* Change `MMKV.mmkvWithID()` from returning `null` to throwing exceptions on any error.
+* Add `MMKV.actualSize()` to get the actual used size of the file.
+
+### Flutter (v1.2.11)
+* Bug Fixed: When building on iOS, occasionally it will fail on symbol conflict with other libs. We have renamed all public native methods to avoid potential conflict.
+* Keep up with MMKV native lib v1.2.10.
+
 ## v1.2.9 / 2021-05-26
 This version is mainly for Android & Flutter.  
 
diff --git a/Core/MMKVPredef.h b/Core/MMKVPredef.h
index 187b2364..bc40377f 100755
--- a/Core/MMKVPredef.h
+++ b/Core/MMKVPredef.h
@@ -34,7 +34,7 @@
 #include <vector>
 #include <unordered_map>
 
-constexpr auto MMKV_VERSION = "v1.2.9";
+constexpr auto MMKV_VERSION = "v1.2.10";
 
 #ifdef DEBUG
 #    define MMKV_DEBUG
diff --git a/MMKV.podspec b/MMKV.podspec
index 38c010a9..1971dec5 100644
--- a/MMKV.podspec
+++ b/MMKV.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "MMKV"
-  s.version      = "1.2.9"
+  s.version      = "1.2.10"
   s.summary      = "MMKV is a cross-platform key-value storage framework developed by WeChat."
 
   s.description  = <<-DESC
@@ -30,7 +30,7 @@ Pod::Spec.new do |s|
     "CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF" => "NO",
   }
 
-  s.dependency 'MMKVCore', '~> 1.2.9'
+  s.dependency 'MMKVCore', '~> 1.2.10'
 
 end
 
diff --git a/MMKVAppExtension.podspec b/MMKVAppExtension.podspec
index 9bb04e6d..70dfce0f 100644
--- a/MMKVAppExtension.podspec
+++ b/MMKVAppExtension.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "MMKVAppExtension"
-  s.version      = "1.2.9"
+  s.version      = "1.2.10"
   s.summary      = "MMKV is a cross-platform key-value storage framework developed by WeChat."
   s.module_name  = "MMKVAppExtension"
 
@@ -31,7 +31,7 @@ Pod::Spec.new do |s|
     "GCC_PREPROCESSOR_DEFINITIONS" => "MMKV_IOS_EXTENSION",
   }
 
-  s.dependency 'MMKVCore', '~> 1.2.9'
+  s.dependency 'MMKVCore', '~> 1.2.10'
 
 end
 
diff --git a/MMKVCore.podspec b/MMKVCore.podspec
index 7a37cc40..f79e0b7b 100644
--- a/MMKVCore.podspec
+++ b/MMKVCore.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "MMKVCore"
-  s.version      = "1.2.9"
+  s.version      = "1.2.10"
   s.summary      = "MMKVCore for MMKV. MMKV is a cross-platform key-value storage framework developed by WeChat."
 
   s.description  = <<-DESC
diff --git a/MMKVWatchExtension.podspec b/MMKVWatchExtension.podspec
index a60e7598..d0bb0247 100644
--- a/MMKVWatchExtension.podspec
+++ b/MMKVWatchExtension.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "MMKVWatchExtension"
-  s.version      = "1.2.9"
+  s.version      = "1.2.10"
   s.summary      = "MMKV is a cross-platform key-value storage framework developed by WeChat."
   s.module_name  = "MMKVWatchExtension"
 
@@ -31,7 +31,7 @@ Pod::Spec.new do |s|
     "GCC_PREPROCESSOR_DEFINITIONS" => "MMKV_IOS_EXTENSION",
   }
 
-  s.dependency 'MMKVCore', '~> 1.2.9'
+  s.dependency 'MMKVCore', '~> 1.2.10'
 
 end
 
diff --git a/README.md b/README.md
index bfcd8165..7c4f9034 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 [![license](https://img.shields.io/badge/license-BSD_3-brightgreen.svg?style=flat)](https://github.com/Tencent/MMKV/blob/master/LICENSE.TXT)
 [![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/Tencent/MMKV/pulls)
-[![Release Version](https://img.shields.io/badge/release-1.2.9-brightgreen.svg)](https://github.com/Tencent/MMKV/releases)
+[![Release Version](https://img.shields.io/badge/release-1.2.10-brightgreen.svg)](https://github.com/Tencent/MMKV/releases)
 [![Platform](https://img.shields.io/badge/Platform-%20Android%20%7C%20iOS%2FmacOS%20%7C%20Win32%20%7C%20POSIX-brightgreen.svg)](https://github.com/Tencent/MMKV/wiki/home)
 
 中文版本请参看[这里](./README_CN.md)
@@ -28,8 +28,8 @@ Add the following lines to `build.gradle` on your app module:
 
 ```gradle
 dependencies {
-    implementation 'com.tencent:mmkv-static:1.2.9'
-    // replace "1.2.9" with any available version
+    implementation 'com.tencent:mmkv-static:1.2.10'
+    // replace "1.2.10" with any available version
 }
 ```
 
diff --git a/README_CN.md b/README_CN.md
index 68e9d68f..52099e24 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -22,8 +22,8 @@ MMKV 是基于 mmap 内存映射的 key-value 组件，底层序列化/反序列
 
 ```gradle
 dependencies {
-    implementation 'com.tencent:mmkv-static:1.2.9'
-    // replace "1.2.9" with any available version
+    implementation 'com.tencent:mmkv-static:1.2.10'
+    // replace "1.2.10" with any available version
 }
 ```
 从 v1.2.8 起, MMKV **迁移到 Maven Central**。老版本 (<= v1.2.7) 仍然在 JCenter。  
diff --git a/flutter/CHANGELOG.md b/flutter/CHANGELOG.md
index 49e6a7e2..07d2d138 100644
--- a/flutter/CHANGELOG.md
+++ b/flutter/CHANGELOG.md
@@ -1,7 +1,8 @@
 # MMKV for Flutter Change Log
 
-## v1.2.11 / 2021-06-xx
-* Rename iOS function names to avoid conflict with other libs.
+## v1.2.11 / 2021-06-25
+* Bug Fixed: When building on iOS, occasionally it will fail on symbol conflict with other libs. We have renamed all public native methods to avoid potential conflict.
+* Keep up with MMKV native lib v1.2.10.
 
 ## v1.2.10 / 2021-05-26
 * Bug Fixed: When calling `MMKV.encodeString()` with an empty string value on Android, `MMKV.decodeString()` will return `null`.
diff --git a/flutter/android/build.gradle b/flutter/android/build.gradle
index 7f0026ac..93348432 100644
--- a/flutter/android/build.gradle
+++ b/flutter/android/build.gradle
@@ -33,6 +33,6 @@ android {
     }
 
     dependencies {
-        implementation 'com.tencent:mmkv-static:[1.2.9,)'
+        implementation 'com.tencent:mmkv-static:[1.2.10,)'
     }
 }
diff --git a/flutter/ios/mmkvflutter.podspec b/flutter/ios/mmkvflutter.podspec
index d743143f..f73fd07a 100644
--- a/flutter/ios/mmkvflutter.podspec
+++ b/flutter/ios/mmkvflutter.podspec
@@ -5,7 +5,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'mmkvflutter'
-  s.version          = '1.2.10'
+  s.version          = '1.2.11'
   s.summary          = 'MMKV is a cross-platform key-value storage framework developed by WeChat.'
   s.description      = <<-DESC
   The MMKV, for Flutter.
@@ -19,7 +19,7 @@ Pod::Spec.new do |s|
   s.source_files = 'Classes/**/*'
   s.public_header_files = 'Classes/**/*.h'
   s.dependency 'Flutter'
-  s.dependency 'MMKV', '>= 1.2.8'
+  s.dependency 'MMKV', '>= 1.2.10'
   s.platform = :ios, '9.0'
 
 # Flutter.framework does not contain a i386 slice.
diff --git a/iOS/MMKV/MMKV.xcodeproj/project.pbxproj b/iOS/MMKV/MMKV.xcodeproj/project.pbxproj
index dfb0a7ae..bec19657 100644
--- a/iOS/MMKV/MMKV.xcodeproj/project.pbxproj
+++ b/iOS/MMKV/MMKV.xcodeproj/project.pbxproj
@@ -485,7 +485,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
-				MARKETING_VERSION = 1.2.9;
+				MARKETING_VERSION = 1.2.10;
 				"OTHER_LDFLAGS[sdk=iphoneos*]" = (
 					"-framework",
 					UIKit,
@@ -528,7 +528,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
-				MARKETING_VERSION = 1.2.9;
+				MARKETING_VERSION = 1.2.10;
 				"OTHER_LDFLAGS[sdk=iphoneos*]" = (
 					"-framework",
 					UIKit,
@@ -725,7 +725,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
-				MARKETING_VERSION = 1.2.9;
+				MARKETING_VERSION = 1.2.10;
 				"OTHER_LDFLAGS[sdk=iphoneos*]" = (
 					"-framework",
 					UIKit,
@@ -763,7 +763,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
-				MARKETING_VERSION = 1.2.9;
+				MARKETING_VERSION = 1.2.10;
 				"OTHER_LDFLAGS[sdk=iphoneos*]" = (
 					"-framework",
 					UIKit,
@@ -808,7 +808,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
-				MARKETING_VERSION = 1.2.9;
+				MARKETING_VERSION = 1.2.10;
 				"OTHER_LDFLAGS[sdk=iphoneos*]" = (
 					"-framework",
 					UIKit,
@@ -855,7 +855,7 @@
 				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @loader_path/Frameworks";
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
-				MARKETING_VERSION = 1.2.9;
+				MARKETING_VERSION = 1.2.10;
 				"OTHER_LDFLAGS[sdk=iphoneos*]" = (
 					"-framework",
 					UIKit,