diff --git a/app/src/main/java/org/linphone/ui/assistant/fragment/RegisterFragment.kt b/app/src/main/java/org/linphone/ui/assistant/fragment/RegisterFragment.kt
index 6790a7719..c2d72588c 100644
--- a/app/src/main/java/org/linphone/ui/assistant/fragment/RegisterFragment.kt
+++ b/app/src/main/java/org/linphone/ui/assistant/fragment/RegisterFragment.kt
@@ -100,23 +100,7 @@ class RegisterFragment : GenericFragment() {
         }
 
         binding.setOpenSubscribeWebPageClickListener {
-            val url = getString(R.string.web_platform_register_email_url)
-            try {
-                val browserIntent = Intent(Intent.ACTION_VIEW, url.toUri())
-                startActivity(browserIntent)
-            } catch (ise: IllegalStateException) {
-                Log.e(
-                    "$TAG Can't start ACTION_VIEW intent for URL [$url], IllegalStateException: $ise"
-                )
-            } catch (anfe: ActivityNotFoundException) {
-                Log.e(
-                    "$TAG Can't start ACTION_VIEW intent for URL [$url], ActivityNotFoundException: $anfe"
-                )
-            } catch (e: Exception) {
-                Log.e(
-                    "$TAG Can't start ACTION_VIEW intent for URL [$url]: $e"
-                )
-            }
+            openSubscribeOnlineWebpage()
         }
 
         binding.username.addTextChangedListener(object : TextWatcher {
@@ -152,6 +136,12 @@ class RegisterFragment : GenericFragment() {
             }
         }
 
+        viewModel.accountCantBeCreatedBySmsEvent.observe(viewLifecycleOwner) {
+            it.consume {
+                showPhoneNumberValidationNotAvailableDialog()
+            }
+        }
+
         viewModel.goToSmsCodeConfirmationViewEvent.observe(viewLifecycleOwner) {
             it.consume {
                 Log.i("$TAG Going to SMS code confirmation fragment")
@@ -224,4 +214,47 @@ class RegisterFragment : GenericFragment() {
 
         dialog.show()
     }
+
+    private fun openSubscribeOnlineWebpage() {
+        val url = getString(R.string.web_platform_register_email_url)
+        try {
+            val browserIntent = Intent(Intent.ACTION_VIEW, url.toUri())
+            startActivity(browserIntent)
+        } catch (ise: IllegalStateException) {
+            Log.e(
+                "$TAG Can't start ACTION_VIEW intent for URL [$url], IllegalStateException: $ise"
+            )
+        } catch (anfe: ActivityNotFoundException) {
+            Log.e(
+                "$TAG Can't start ACTION_VIEW intent for URL [$url], ActivityNotFoundException: $anfe"
+            )
+        } catch (e: Exception) {
+            Log.e(
+                "$TAG Can't start ACTION_VIEW intent for URL [$url]: $e"
+            )
+        }
+    }
+
+    private fun showPhoneNumberValidationNotAvailableDialog() {
+        val model = ConfirmationDialogModel()
+        val dialog = DialogUtils.getAccountCreationPhoneNumberValidationNotAvailableDialog(
+            requireActivity(),
+            model
+        )
+
+        model.dismissEvent.observe(viewLifecycleOwner) {
+            it.consume {
+                dialog.dismiss()
+            }
+        }
+
+        model.confirmEvent.observe(viewLifecycleOwner) {
+            it.consume {
+                openSubscribeOnlineWebpage()
+                dialog.dismiss()
+            }
+        }
+
+        dialog.show()
+    }
 }
diff --git a/app/src/main/java/org/linphone/ui/assistant/viewmodel/AccountCreationViewModel.kt b/app/src/main/java/org/linphone/ui/assistant/viewmodel/AccountCreationViewModel.kt
index 139145f21..19ebe9529 100644
--- a/app/src/main/java/org/linphone/ui/assistant/viewmodel/AccountCreationViewModel.kt
+++ b/app/src/main/java/org/linphone/ui/assistant/viewmodel/AccountCreationViewModel.kt
@@ -108,6 +108,10 @@ class AccountCreationViewModel
         MutableLiveData()
     }
 
+    val accountCantBeCreatedBySmsEvent: MutableLiveData<Event<Boolean>> by lazy {
+        MutableLiveData()
+    }
+
     private var waitingForFlexiApiPushToken = false
     private var waitForPushJob: Job? = null
 
@@ -166,7 +170,11 @@ class AccountCreationViewModel
             operationInProgress.postValue(false)
 
             if (!errorMessage.isNullOrEmpty()) {
-                showFormattedRedToast(errorMessage, R.drawable.warning_circle)
+                if (request.type == AccountManagerServicesRequest.Type.SendPhoneNumberLinkingCodeBySms && statusCode == 422) {
+                    // Do not show error message sent by the account management platform for this specific scenario
+                } else {
+                    showFormattedRedToast(errorMessage, R.drawable.warning_circle)
+                }
             }
 
             for (parameter in parameterErrors?.keys.orEmpty()) {
@@ -186,6 +194,7 @@ class AccountCreationViewModel
                     waitForPushJob?.cancel()
                 }
                 AccountManagerServicesRequest.Type.SendPhoneNumberLinkingCodeBySms -> {
+                    Log.e("$TAG Error sending SMS code, clearing auth info & account")
                     val authInfo = accountCreatedAuthInfo
                     if (authInfo != null) {
                         coreContext.core.removeAuthInfo(authInfo)
@@ -194,6 +203,10 @@ class AccountCreationViewModel
                     if (account != null) {
                         coreContext.core.removeAccount(account)
                     }
+
+                    if (statusCode == 422) {
+                        accountCantBeCreatedBySmsEvent.postValue(Event(true))
+                    }
                 }
                 else -> {
                 }
diff --git a/app/src/main/java/org/linphone/utils/DialogUtils.kt b/app/src/main/java/org/linphone/utils/DialogUtils.kt
index ffa5a40fa..5c4fa287b 100644
--- a/app/src/main/java/org/linphone/utils/DialogUtils.kt
+++ b/app/src/main/java/org/linphone/utils/DialogUtils.kt
@@ -66,6 +66,7 @@ import org.linphone.ui.main.contacts.model.ContactTrustDialogModel
 import org.linphone.ui.main.contacts.model.NumberOrAddressPickerDialogModel
 import org.linphone.ui.main.model.GroupSetOrEditSubjectDialogModel
 import androidx.core.graphics.drawable.toDrawable
+import org.linphone.databinding.DialogAssistantCreateAccountPhoneNumberValidationNotAvailableBinding
 import org.linphone.databinding.DialogDeleteChatMessageBinding
 import org.linphone.databinding.DialogManageAccountOutboundProxyHelpBinding
 import org.linphone.ui.main.chat.model.MessageDeleteDialogModel
@@ -105,6 +106,22 @@ class DialogUtils {
             return getDialog(context, binding)
         }
 
+        @UiThread
+        fun getAccountCreationPhoneNumberValidationNotAvailableDialog(
+            context: Context,
+            viewModel: ConfirmationDialogModel
+        ): Dialog {
+            val binding: DialogAssistantCreateAccountPhoneNumberValidationNotAvailableBinding = DataBindingUtil.inflate(
+                LayoutInflater.from(context),
+                R.layout.dialog_assistant_create_account_phone_number_validation_not_available,
+                null,
+                false
+            )
+            binding.viewModel = viewModel
+
+            return getDialog(context, binding)
+        }
+
         @UiThread
         fun getAccountInternationalPrefixHelpDialog(context: Context): Dialog {
             val binding: DialogManageAccountInternationalPrefixHelpBinding = DataBindingUtil.inflate(
diff --git a/app/src/main/res/layout/dialog_assistant_create_account_phone_number_validation_not_available.xml b/app/src/main/res/layout/dialog_assistant_create_account_phone_number_validation_not_available.xml
new file mode 100644
index 000000000..059010a2a
--- /dev/null
+++ b/app/src/main/res/layout/dialog_assistant_create_account_phone_number_validation_not_available.xml
@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <data>
+        <import type="android.view.View" />
+        <variable
+            name="viewModel"
+            type="org.linphone.utils.ConfirmationDialogModel" />
+    </data>
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:onClick="@{() -> viewModel.dismiss()}"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <ImageView
+            android:id="@+id/dialog_background"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            android:layout_marginStart="12dp"
+            android:layout_marginEnd="12dp"
+            android:layout_marginBottom="2dp"
+            android:src="@drawable/shape_dialog_background"
+            android:contentDescription="@null"
+            app:layout_constraintWidth_max="@dimen/dialog_max_width"
+            app:layout_constraintBottom_toBottomOf="@id/anchor"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="@id/title" />
+
+        <androidx.appcompat.widget.AppCompatTextView
+            style="@style/section_header_style"
+            android:id="@+id/title"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="15dp"
+            android:paddingTop="@dimen/dialog_top_bottom_margin"
+            android:text="@string/assistant_dialog_phone_number_validation_not_available_title"
+            app:layout_constraintVertical_chainStyle="packed"
+            app:layout_constraintBottom_toTopOf="@id/message"
+            app:layout_constraintStart_toStartOf="@id/dialog_background"
+            app:layout_constraintEnd_toEndOf="@id/dialog_background"
+            app:layout_constraintTop_toTopOf="parent" />
+
+        <androidx.appcompat.widget.AppCompatTextView
+            style="@style/default_text_style"
+            android:id="@+id/message"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="15dp"
+            android:layout_marginEnd="15dp"
+            android:layout_marginTop="10dp"
+            android:text="@string/assistant_dialog_phone_number_validation_not_available_message"
+            android:textSize="14sp"
+            app:layout_constraintBottom_toTopOf="@id/cancel"
+            app:layout_constraintStart_toStartOf="@id/dialog_background"
+            app:layout_constraintEnd_toEndOf="@id/dialog_background"
+            app:layout_constraintTop_toBottomOf="@id/title" />
+
+        <androidx.appcompat.widget.AppCompatTextView
+            android:onClick="@{() -> viewModel.confirm()}"
+            style="@style/primary_dialog_button_label_style"
+            android:id="@+id/confirm"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="15dp"
+            android:layout_marginEnd="15dp"
+            android:text="@string/assistant_dialog_phone_number_validation_not_available_register_button_label"
+            app:layout_constrainedWidth="true"
+            app:layout_constraintHorizontal_bias="1"
+            app:layout_constraintHorizontal_chainStyle="packed"
+            app:layout_constraintStart_toStartOf="@id/dialog_background"
+            app:layout_constraintEnd_toStartOf="@id/cancel"
+            app:layout_constraintTop_toTopOf="@id/cancel"
+            app:layout_constraintBottom_toBottomOf="@id/cancel"/>
+
+        <androidx.appcompat.widget.AppCompatTextView
+            android:onClick="@{() -> viewModel.dismiss()}"
+            style="@style/secondary_dialog_button_label_style"
+            android:id="@+id/cancel"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="32dp"
+            android:layout_marginStart="15dp"
+            android:layout_marginEnd="15dp"
+            android:text="@string/dialog_cancel"
+            app:layout_constrainedWidth="true"
+            app:layout_constraintStart_toEndOf="@id/confirm"
+            app:layout_constraintEnd_toEndOf="@id/dialog_background"
+            app:layout_constraintTop_toBottomOf="@id/message"
+            app:layout_constraintBottom_toTopOf="@id/anchor"/>
+
+        <View
+            android:id="@+id/anchor"
+            android:layout_width="wrap_content"
+            android:layout_height="@dimen/dialog_top_bottom_margin"
+            app:layout_constraintTop_toBottomOf="@id/cancel"
+            app:layout_constraintStart_toStartOf="@id/dialog_background"
+            app:layout_constraintEnd_toEndOf="@id/dialog_background"
+            app:layout_constraintBottom_toBottomOf="parent"/>
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</layout>
\ No newline at end of file
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index 1beca0ede..b2d20ec06 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -108,6 +108,9 @@
     <string name="assistant_dialog_general_terms_and_privacy_policy_message">En continuant, vous acceptez nos %1$s et %2$s.</string>
     <string name="assistant_dialog_confirm_phone_number_title">Confirmez votre numéro de téléphone</string>
     <string name="assistant_dialog_confirm_phone_number_message">Êtes-vous sûr que le %s est votre numéro de téléphone ?</string>
+    <string name="assistant_dialog_phone_number_validation_not_available_title">Inscription par téléphone indisponible</string>
+    <string name="assistant_dialog_phone_number_validation_not_available_message">L\'inscription par numéro de téléphone n\'est pas disponible, veuillez utiliser l\'inscription par adresse email.</string>
+    <string name="assistant_dialog_phone_number_validation_not_available_register_button_label">S\'inscrire avec un email</string>
     <string name="assistant_account_login">Connexion</string>
     <string name="assistant_scan_qr_code">Scanner un QR code</string>
     <string name="assistant_qr_code_invalid_toast">Ce QR code est invalide !</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 54bef35ef..acb794950 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -150,6 +150,9 @@
     <string name="assistant_dialog_general_terms_and_privacy_policy_message">By continuing, you accept our %1$s and %2$s.</string>
     <string name="assistant_dialog_confirm_phone_number_title">Confirm phone number</string>
     <string name="assistant_dialog_confirm_phone_number_message">Are you sure your phone number is %s?</string>
+    <string name="assistant_dialog_phone_number_validation_not_available_title">Phone number validation not available</string>
+    <string name="assistant_dialog_phone_number_validation_not_available_message">Phone number validation is not available, please use email account creation process.</string>
+    <string name="assistant_dialog_phone_number_validation_not_available_register_button_label">Register with an email</string>
     <string name="assistant_account_login">Login</string>
     <string name="assistant_scan_qr_code">Scan QR code</string>
     <string name="assistant_qr_code_invalid_toast">Invalid QR code!</string>