diff --git a/clear_data.sh b/clear_data.sh
index 485417d..86f813b 100644
--- a/clear_data.sh
+++ b/clear_data.sh
@@ -40,3 +40,27 @@ adb -s d54e946 shell am start -n com.android.chrome/com.google.android.apps.chro
 adb -s 926f2061 shell pm clear com.android.chrome
 adb -s 926f2061 shell am set-debug-app --persistent com.android.chrome
 adb -s 926f2061 shell am start -n com.android.chrome/com.google.android.apps.chrome.Main
+#samsung J5 - 2016
+adb -s 4f55c3d4 shell pm clear com.android.chrome
+adb -s 4f55c3d4 shell am set-debug-app --persistent com.android.chrome
+adb -s 4f55c3d4 shell am start -n com.android.chrome/com.google.android.apps.chrome.Main
+
+#samsung J5 - 2016
+adb -s 69db59f0 shell pm clear com.android.chrome
+adb -s 69db59f0 shell am set-debug-app --persistent com.android.chrome
+adb -s 69db59f0 shell am start -n com.android.chrome/com.google.android.apps.chrome.Main
+
+#samsung J5 - 2016
+adb -s 6c3076e6 shell pm clear com.android.chrome
+adb -s 6c3076e6 shell am set-debug-app --persistent com.android.chrome
+adb -s 6c3076e6 shell am start -n com.android.chrome/com.google.android.apps.chrome.Main
+
+#samsung J5 - 2016
+adb -s 774687ff shell pm clear com.android.chrome
+adb -s 774687ff shell am set-debug-app --persistent com.android.chrome
+adb -s 774687ff shell am start -n com.android.chrome/com.google.android.apps.chrome.Main
+
+#samsung J5 - 2016
+adb -s ffa9b2bc shell pm clear com.android.chrome
+adb -s ffa9b2bc shell am set-debug-app --persistent com.android.chrome
+adb -s ffa9b2bc shell am start -n com.android.chrome/com.google.android.apps.chrome.Main
diff --git a/src/workers/CommandorPage.js b/src/workers/CommandorPage.js
index 6add8c0..314da99 100644
--- a/src/workers/CommandorPage.js
+++ b/src/workers/CommandorPage.js
@@ -229,7 +229,9 @@ class CommandorPage {
         try {
             if (!this.page.isClosed()) {
                 this.page.evaluate(() => {
-                    document.getElementsByClassName("btn")[0].focus();
+                    let element = document.getElementsByClassName("btn")[0];
+                    if (typeof element !== 'undefined')
+                        document.getElementsByClassName("btn")[0].focus();
                 })
                 await delay(getRandomWaitTime())
                 if (!this.page.isClosed()) {