diff --git a/.ci/scripts/build-qnn-sdk.sh b/.ci/scripts/build-qnn-sdk.sh
index 7f34e8afb63..971581eb053 100755
--- a/.ci/scripts/build-qnn-sdk.sh
+++ b/.ci/scripts/build-qnn-sdk.sh
@@ -11,10 +11,8 @@ set -o xtrace
 
 build_qnn_backend() {
   echo "Start building qnn backend."
-  # Source QNN configuration
-  source "$(dirname "${BASH_SOURCE[0]}")/../../backends/qualcomm/scripts/install_qnn_sdk.sh"
-  setup_android_ndk
-  install_qnn
+  export ANDROID_NDK_ROOT=${ANDROID_NDK_ROOT:-/opt/ndk}
+  export QNN_SDK_ROOT=${QNN_SDK_ROOT:-/tmp/qnn/2.28.0.241029}
   export EXECUTORCH_ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/../.." && pwd)"
 
   parallelism=$(( $(nproc) - 1 ))
diff --git a/.ci/scripts/setup-qnn-deps.sh b/.ci/scripts/setup-qnn-deps.sh
index 9af688d5cb7..d962f7b908a 100644
--- a/.ci/scripts/setup-qnn-deps.sh
+++ b/.ci/scripts/setup-qnn-deps.sh
@@ -10,5 +10,4 @@ set -ex
 source "$(dirname "${BASH_SOURCE[0]}")/../../backends/qualcomm/scripts/install_qnn_sdk.sh"
 
 setup_libcpp 12
-setup_android_ndk
 install_qnn
diff --git a/.ci/scripts/test_llama.sh b/.ci/scripts/test_llama.sh
index 84278e290f6..05c6c8e7fab 100644
--- a/.ci/scripts/test_llama.sh
+++ b/.ci/scripts/test_llama.sh
@@ -119,12 +119,8 @@ echo "COREML option ${COREML}"
 
 if [[ "${MODE}" =~ .*qnn.* ]]; then
   QNN=ON
-
-  # Download QNN_SDK. If already downloaded, export environment path
-  source "$(dirname "${BASH_SOURCE[0]}")/../../backends/qualcomm/scripts/install_qnn_sdk.sh"
-  install_qnn
-
   export EXECUTORCH_ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
+  export QNN_SDK_ROOT=/tmp/qnn/2.28.0.241029
   export LD_LIBRARY_PATH="${QNN_SDK_ROOT}/lib/x86_64-linux-clang"
   export PYTHONPATH=".."
   cp schema/program.fbs exir/_serialize/program.fbs
diff --git a/.ci/scripts/test_qnn_static_llama.sh b/.ci/scripts/test_qnn_static_llama.sh
index 0a708fea76a..d70eca81b69 100644
--- a/.ci/scripts/test_qnn_static_llama.sh
+++ b/.ci/scripts/test_qnn_static_llama.sh
@@ -9,13 +9,8 @@ set -euxo pipefail
 
 source "$(dirname "${BASH_SOURCE[0]}")/utils.sh"
 
-# Source QNN configuration
-source "$(dirname "${BASH_SOURCE[0]}")/../../backends/qualcomm/scripts/qnn_config.sh"
-# Download QNN_SDK. If already downloaded, export environment path
-source "$(dirname "${BASH_SOURCE[0]}")/../../backends/qualcomm/scripts/install_qnn_sdk.sh"
-install_qnn
-
 export EXECUTORCH_ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
+export QNN_SDK_ROOT=/tmp/qnn/2.28.0.241029
 export LD_LIBRARY_PATH="${QNN_SDK_ROOT}/lib/x86_64-linux-clang"
 export PYTHONPATH=".."
 cp schema/program.fbs exir/_serialize/program.fbs
diff --git a/.github/workflows/android-perf.yml b/.github/workflows/android-perf.yml
index b37478686a9..48a1c43f79a 100644
--- a/.github/workflows/android-perf.yml
+++ b/.github/workflows/android-perf.yml
@@ -292,7 +292,7 @@ jobs:
                       export.output_name="${OUT_ET_MODEL_NAME}.pte"
                     ls -lh "${OUT_ET_MODEL_NAME}.pte"
                 elif [[ ${{ matrix.config }} == "llama3_qnn_htp" ]]; then
-                    export QNN_SDK_ROOT=/tmp/qnn/2.37.0.25072
+                    export QNN_SDK_ROOT=/tmp/qnn/2.28.0.241029
                     export LD_LIBRARY_PATH=$QNN_SDK_ROOT/lib/x86_64-linux-clang/
                     export PYTHONPATH=$(pwd)/..
 
@@ -432,7 +432,7 @@ jobs:
         PYTHON_EXECUTABLE=python bash .ci/scripts/build-qnn-sdk.sh
 
         mkdir -p aar-out
-        PYTHON_EXECUTABLE=python ANDROID_ABIS="arm64-v8a" BUILD_AAR_DIR=aar-out EXECUTORCH_BUILD_QNN=ON QNN_SDK_ROOT=/tmp/qnn/2.37.0.25072 EXECUTORCH_ANDROID_PROFILING=ON bash scripts/build_android_library.sh
+        PYTHON_EXECUTABLE=python ANDROID_ABIS="arm64-v8a" BUILD_AAR_DIR=aar-out EXECUTORCH_BUILD_QNN=ON QNN_SDK_ROOT=/tmp/qnn/2.28.0.241029 EXECUTORCH_ANDROID_PROFILING=ON bash scripts/build_android_library.sh
         mkdir -p extension/benchmark/android/benchmark/app/libs
         cp aar-out/executorch.aar extension/benchmark/android/benchmark/app/libs
         pushd extension/benchmark/android/benchmark
diff --git a/.github/workflows/android-release-artifacts.yml b/.github/workflows/android-release-artifacts.yml
index f0b74342eb8..1e6057ac3ef 100644
--- a/.github/workflows/android-release-artifacts.yml
+++ b/.github/workflows/android-release-artifacts.yml
@@ -104,7 +104,7 @@ jobs:
           source backends/qualcomm/scripts/qnn_config.sh
           export QNN_SDK_ROOT="/tmp/qnn/${QNN_VERSION}"
           export ANDROID_ABIS=arm64-v8a
-          GRADLE_ARGS+=" -DqnnVersion=2.37.0"
+          GRADLE_ARGS+=" -DqnnVersion=2.28.0"
         fi
 
         # Build AAR Package
diff --git a/backends/qualcomm/scripts/install_qnn_sdk.sh b/backends/qualcomm/scripts/install_qnn_sdk.sh
index a97d4258770..a8f9e63862d 100644
--- a/backends/qualcomm/scripts/install_qnn_sdk.sh
+++ b/backends/qualcomm/scripts/install_qnn_sdk.sh
@@ -48,12 +48,6 @@ install_qnn() {
 
   echo "Start installing qnn v${QNN_VERSION}"
   QNN_INSTALLATION_DIR="/tmp/qnn"
-  
-  if [ -d "${QNN_INSTALLATION_DIR}/${QNN_VERSION}" ]; then
-        echo "QNN SDK already installed at ${QNN_INSTALLATION_DIR}/${QNN_VERSION}"
-        export QNN_SDK_ROOT="${QNN_INSTALLATION_DIR}/${QNN_VERSION}"
-        return
-  fi
 
   # Clean up any previous installation
   if [ -d "${QNN_INSTALLATION_DIR}" ]; then
@@ -85,7 +79,7 @@ install_qnn() {
   ls -lah "${QNN_INSTALLATION_DIR}"
 
   # Set QNN_SDK_ROOT environment variable
-  export QNN_SDK_ROOT="${QNN_INSTALLATION_DIR}/${QNN_VERSION}"
+  export QNN_SDK_ROOT="${QNN_INSTALLATION_DIR}"
   echo "Set QNN_SDK_ROOT=${QNN_SDK_ROOT}"
 }
 
@@ -153,3 +147,7 @@ setup_libcpp() {
 
   echo "libc++ installed to ${INSTALL_DIR}"
 }
+
+setup_libcpp 12
+setup_android_ndk
+install_qnn
diff --git a/backends/qualcomm/scripts/qnn_config.sh b/backends/qualcomm/scripts/qnn_config.sh
index 938eb0d3007..fe2d82e939e 100644
--- a/backends/qualcomm/scripts/qnn_config.sh
+++ b/backends/qualcomm/scripts/qnn_config.sh
@@ -6,5 +6,5 @@
 # LICENSE file in the root directory of this source tree.
 
 # QNN SDK Configuration
-QNN_VERSION="2.37.0.250724"
-QNN_ZIP_URL="https://softwarecenter.qualcomm.com/api/download/software/sdks/Qualcomm_AI_Runtime_Community/All/${QNN_VERSION}/v${QNN_VERSION}.zip"
+QNN_VERSION="2.28.0.241029"
+QNN_ZIP_URL="https://softwarecenter.qualcomm.com/api/download/software/qualcomm_neural_processing_sdk/v${QNN_VERSION}.zip"
diff --git a/shim_et/xplat/executorch/backends/qualcomm/qnn_version.bzl b/shim_et/xplat/executorch/backends/qualcomm/qnn_version.bzl
index fd05d09efb4..bd011748786 100644
--- a/shim_et/xplat/executorch/backends/qualcomm/qnn_version.bzl
+++ b/shim_et/xplat/executorch/backends/qualcomm/qnn_version.bzl
@@ -1,2 +1,2 @@
 def get_qnn_library_version():
-    return "2.37"
+    return "2.28"