diff --git a/app/Http/Controllers/Netbien/SimCardController.php b/app/Http/Controllers/Netbien/SimCardController.php
index aaa3c5c..bc7179b 100644
--- a/app/Http/Controllers/Netbien/SimCardController.php
+++ b/app/Http/Controllers/Netbien/SimCardController.php
@@ -110,6 +110,7 @@ public function destroy(SimCard $simCard)
     private $columnMap = [];
     private $stats = [
         'created' => 0,
+        'updated' => 0,
         'assigned' => 0,
         'packages_created' => 0,
         'clients_created' => 0,
@@ -213,12 +214,22 @@ private function processRow(array $row, int $rowNumber = 0)
             ]);
 
             $this->stats['created']++;
+        } else {
+            // Ya existe, actualizar (msisdn en caso de cambio)
+            $sim->update([
+                'msisdn' => $row['msisdn'],
+            ]);
+
+            if (!isset($this->stats['updated'])) {
+                $this->stats['updated'] = 0;
+            }
+            $this->stats['updated']++;
         }
 
         // Determinar si es una venta (tiene usuario Y paquete)
         $hasUsuario = !empty($row['usuario']) &&
-                      strtolower(trim($row['usuario'])) !== 'si' &&
-                      strtolower(trim($row['usuario'])) !== 'no';
+            strtolower(trim($row['usuario'])) !== 'si' &&
+            strtolower(trim($row['usuario'])) !== 'no';
         $hasPaquete = !empty($row['paquetes']);
 
         if ($hasUsuario && $hasPaquete) {
@@ -314,16 +325,52 @@ private function processSale(SimCard $sim, array $row)
             ]);
         }
 
-        // Asignar paquete a la SIM
-        $sim->packages()->attach($package->id, [
-            'activated_at' => $saleDate,
-            'is_active' => true,
-        ]);
+        // Verificar si ya existe una venta para esta SIM con este paquete
+        // (para evitar duplicados en reimportaciones)
+        $existingSale = Sale::whereHas('saleItems', function ($query) use ($sim, $package) {
+            $query->where('sim_card_id', $sim->id)
+                ->where('package_id', $package->id);
+        })->where('client_id', $client->id)
+            ->where('sale_date', $saleDate)
+            ->exists();
+
+        if (!$existingSale) {
+            // Crear la venta
+            $sale = Sale::create([
+                'client_id' => $client->id,
+                'cash_close_id' => null, // Importaciones no tienen corte de caja
+                'total_amount' => $package->price,
+                'payment_method' => $paymentMethod,
+                'sale_date' => $saleDate,
+            ]);
+
+            // Crear el item de venta
+            SaleItem::create([
+                'sale_id' => $sale->id,
+                'sim_card_id' => $sim->id,
+                'package_id' => $package->id,
+            ]);
+
+            $this->stats['sales_created']++;
+        }
+
+        // Asignar paquete a la SIM (usando syncWithoutDetaching para evitar duplicados)
+        // Primero verificamos si ya existe la relación activa
+        $hasActivePackage = $sim->packages()
+            ->wherePivot('package_id', $package->id)
+            ->wherePivot('is_active', true)
+            ->exists();
+
+        if (!$hasActivePackage) {
+            $sim->packages()->attach($package->id, [
+                'activated_at' => $saleDate,
+                'is_active' => true,
+            ]);
+        }
 
         // Actualizar status de la SIM
         $sim->update(['status' => SimCardStatus::ASSIGNED]);
 
-        $this->stats['sales_created']++;
         $this->stats['assigned']++;
     }
 
@@ -401,10 +448,17 @@ private function processPackageFromText(SimCard $sim, array $row)
             $packageInfo['price']
         );
 
-        $sim->packages()->attach($package->id, [
-            'activated_at' => now(),
-            'is_active' => true,
-        ]);
+        $hasActivePackage = $sim->packages()
+        ->wherePivot('package_id', $package->id)
+        ->wherePivot('is_active', true)
+        ->exists();
+
+        if (!$hasActivePackage) {
+            $sim->packages()->attach($package->id, [
+                'activated_at' => now(),
+                'is_active' => true,
+            ]);
+        }
     }
 
     private function parsePackageText(string $text): ?array