diff --git a/internal/api/admin.go b/internal/api/admin.go
index 45b08f041..d6ff069ff 100644
--- a/internal/api/admin.go
+++ b/internal/api/admin.go
@@ -39,7 +39,7 @@ type adminUserDeleteParams struct {
 
 type adminUserUpdateFactorParams struct {
 	FriendlyName string `json:"friendly_name"`
-	FactorType   string `json:"factor_type"`
+	Phone        string `json:"phone"`
 }
 
 type AdminListUsersResponse struct {
@@ -618,11 +618,13 @@ func (a *API) adminUserUpdateFactor(w http.ResponseWriter, r *http.Request) erro
 				return terr
 			}
 		}
-		if params.FactorType != "" {
-			if params.FactorType != models.TOTP {
-				return badRequestError(ErrorCodeValidationFailed, "Factor Type not valid")
+
+		if params.Phone != "" && factor.IsPhoneFactor() {
+			phone, err := validatePhone(params.Phone)
+			if err != nil {
+				return badRequestError(ErrorCodeValidationFailed, "Invalid phone number format (E.164 required)")
 			}
-			if terr := factor.UpdateFactorType(tx, params.FactorType); terr != nil {
+			if terr := factor.UpdatePhone(tx, phone); terr != nil {
 				return terr
 			}
 		}
diff --git a/internal/api/admin_test.go b/internal/api/admin_test.go
index e2904d8bf..a2070d7e2 100644
--- a/internal/api/admin_test.go
+++ b/internal/api/admin_test.go
@@ -816,7 +816,7 @@ func (ts *AdminTestSuite) TestAdminUserUpdateFactor() {
 	require.NoError(ts.T(), err, "Error making new user")
 	require.NoError(ts.T(), ts.API.db.Create(u), "Error creating user")
 
-	f := models.NewTOTPFactor(u, "testSimpleName")
+	f := models.NewPhoneFactor(u, "123456789", "testSimpleName")
 	require.NoError(ts.T(), f.SetSecret("secretkey", ts.Config.Security.DBEncryption.Encrypt, ts.Config.Security.DBEncryption.EncryptionKeyID, ts.Config.Security.DBEncryption.EncryptionKey))
 	require.NoError(ts.T(), ts.API.db.Create(f), "Error saving new test factor")
 
@@ -833,20 +833,12 @@ func (ts *AdminTestSuite) TestAdminUserUpdateFactor() {
 			ExpectedCode: http.StatusOK,
 		},
 		{
-			Desc: "Update factor: valid factor type",
+			Desc: "Update Factor phone number",
 			FactorData: map[string]interface{}{
-				"friendly_name": "john",
-				"factor_type":   models.TOTP,
+				"phone": "+1976154321",
 			},
 			ExpectedCode: http.StatusOK,
 		},
-		{
-			Desc: "Update factor: invalid factor",
-			FactorData: map[string]interface{}{
-				"factor_type": "invalid_factor",
-			},
-			ExpectedCode: http.StatusBadRequest,
-		},
 	}
 
 	// Initialize factor data
diff --git a/internal/models/factor.go b/internal/models/factor.go
index 7c6f6dd30..24cda188f 100644
--- a/internal/models/factor.go
+++ b/internal/models/factor.go
@@ -245,18 +245,17 @@ func (f *Factor) UpdateFriendlyName(tx *storage.Connection, friendlyName string)
 	return tx.UpdateOnly(f, "friendly_name", "updated_at")
 }
 
+func (f *Factor) UpdatePhone(tx *storage.Connection, phone string) error {
+	f.Phone = storage.NullString(phone)
+	return tx.UpdateOnly(f, "phone", "updated_at")
+}
+
 // UpdateStatus modifies the factor status
 func (f *Factor) UpdateStatus(tx *storage.Connection, state FactorState) error {
 	f.Status = state.String()
 	return tx.UpdateOnly(f, "status", "updated_at")
 }
 
-// UpdateFactorType modifies the factor type
-func (f *Factor) UpdateFactorType(tx *storage.Connection, factorType string) error {
-	f.FactorType = factorType
-	return tx.UpdateOnly(f, "factor_type", "updated_at")
-}
-
 func (f *Factor) DowngradeSessionsToAAL1(tx *storage.Connection) error {
 	sessions, err := FindSessionsByFactorID(tx, f.ID)
 	if err != nil {