diff --git a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/DialpadActivity.kt b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/DialpadActivity.kt
index 56ee61cd..bcd5f530 100644
--- a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/DialpadActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/DialpadActivity.kt
@@ -36,6 +36,10 @@ class DialpadActivity : SimpleActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_dialpad)
 
+        if (checkAppSideloading()) {
+            return
+        }
+
         dialpad_0_holder.setOnClickListener { dialpadPressed("0", it) }
         dialpad_1.setOnClickListener { dialpadPressed("1", it) }
         dialpad_2.setOnClickListener { dialpadPressed("2", it) }
diff --git a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/EditContactActivity.kt b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/EditContactActivity.kt
index 80519369..59208c20 100644
--- a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/EditContactActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/EditContactActivity.kt
@@ -59,6 +59,11 @@ class EditContactActivity : ContactActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_edit_contact)
+
+        if (checkAppSideloading()) {
+            return
+        }
+
         supportActionBar?.setHomeAsUpIndicator(R.drawable.ic_cross)
 
         val action = intent.action
diff --git a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/InsertOrEditContactActivity.kt b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/InsertOrEditContactActivity.kt
index 36934f94..889ad503 100644
--- a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/InsertOrEditContactActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/InsertOrEditContactActivity.kt
@@ -4,10 +4,7 @@ import android.app.Activity
 import android.content.Intent
 import android.os.Bundle
 import android.provider.ContactsContract
-import com.simplemobiletools.commons.extensions.getAdjustedPrimaryColor
-import com.simplemobiletools.commons.extensions.getColoredDrawableWithColor
-import com.simplemobiletools.commons.extensions.toast
-import com.simplemobiletools.commons.extensions.updateTextColors
+import com.simplemobiletools.commons.extensions.*
 import com.simplemobiletools.commons.helpers.PERMISSION_READ_CONTACTS
 import com.simplemobiletools.contacts.pro.R
 import com.simplemobiletools.contacts.pro.adapters.ContactsAdapter
@@ -24,6 +21,11 @@ class InsertOrEditContactActivity : SimpleActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_insert_edit_contact)
+
+        if (checkAppSideloading()) {
+            return
+        }
+
         title = getString(R.string.select_contact)
         setupViews()
 
diff --git a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/SelectContactActivity.kt b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/SelectContactActivity.kt
index ffeb168c..dfaad2e4 100644
--- a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/SelectContactActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/SelectContactActivity.kt
@@ -26,6 +26,11 @@ class SelectContactActivity : SimpleActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_select_contact)
+
+        if (checkAppSideloading()) {
+            return
+        }
+
         setupPlaceholders()
 
         handlePermission(PERMISSION_READ_CONTACTS) {
diff --git a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/ViewContactActivity.kt b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/ViewContactActivity.kt
index 7d1df17f..459b4832 100644
--- a/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/ViewContactActivity.kt
+++ b/app/src/main/kotlin/com/simplemobiletools/contacts/pro/activities/ViewContactActivity.kt
@@ -31,6 +31,11 @@ class ViewContactActivity : ContactActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_view_contact)
+
+        if (checkAppSideloading()) {
+            return
+        }
+
         showFields = config.showContactFields
     }