diff --git a/apps/bff/src/integrations/freebit/services/freebit-auth.service.ts b/apps/bff/src/integrations/freebit/services/freebit-auth.service.ts
index 90a0a97a..6950ae1a 100644
--- a/apps/bff/src/integrations/freebit/services/freebit-auth.service.ts
+++ b/apps/bff/src/integrations/freebit/services/freebit-auth.service.ts
@@ -3,12 +3,21 @@ import { ConfigService } from "@nestjs/config";
 import { Logger } from "nestjs-pino";
 import { getErrorMessage } from "@bff/core/utils/error.util";
 import type {
-  FreebitConfig,
-  FreebitAuthRequest,
-  FreebitAuthResponse,
+  AuthRequest as FreebitAuthRequest,
+  AuthResponse as FreebitAuthResponse,
 } from "@customer-portal/domain/sim/providers/freebit";
+import { Providers } from "@customer-portal/domain/sim";
 import { FreebitError } from "./freebit-error.service";
 
+interface FreebitConfig {
+  baseUrl: string;
+  oemId: string;
+  oemKey: string;
+  timeout: number;
+  retryAttempts: number;
+  detailsEndpoint?: string;
+}
+
 @Injectable()
 export class FreebitAuthService {
   private readonly config: FreebitConfig;
@@ -60,10 +69,10 @@ export class FreebitAuthService {
         throw new Error("Freebit API not configured: FREEBIT_OEM_KEY is missing");
       }
 
-      const request: FreebitAuthRequest = {
+      const request = Providers.Freebit.schemas.auth.parse({
         oemId: this.config.oemId,
         oemKey: this.config.oemKey,
-      };
+      });
 
       const response = await fetch(`${this.config.baseUrl}/authOem/`, {
         method: "POST",
@@ -75,13 +84,15 @@ export class FreebitAuthService {
         throw new Error(`HTTP ${response.status}: ${response.statusText}`);
       }
 
-      const data = (await response.json()) as FreebitAuthResponse;
-      if (data.resultCode !== "100") {
+      const json = (await response.json()) as unknown;
+      const data = Providers.Freebit.mapper.transformFreebitAuthResponse(json);
+
+      if (data.resultCode !== "100" || !data.authKey) {
         throw new FreebitError(
-          `Authentication failed: ${data.status.message}`,
+          `Authentication failed: ${data.status?.message ?? "Unknown error"}`,
           data.resultCode,
-          data.status.statusCode,
-          data.status.message
+          data.status?.statusCode,
+          data.status?.message
         );
       }
 
diff --git a/apps/bff/src/integrations/freebit/services/freebit-mapper.service.ts b/apps/bff/src/integrations/freebit/services/freebit-mapper.service.ts
index 3d3b118e..47c8fd88 100644
--- a/apps/bff/src/integrations/freebit/services/freebit-mapper.service.ts
+++ b/apps/bff/src/integrations/freebit/services/freebit-mapper.service.ts
@@ -1,9 +1,4 @@
 import { Injectable } from "@nestjs/common";
-import type {
-  FreebitAccountDetailsResponse,
-  FreebitTrafficInfoResponse,
-  FreebitQuotaHistoryResponse,
-} from "@customer-portal/domain/sim/providers/freebit";
 import type { SimDetails, SimTopUpHistory, SimUsage } from "@customer-portal/domain/sim";
 import { Providers } from "@customer-portal/domain/sim";
 
@@ -12,21 +7,21 @@ export class FreebitMapperService {
   /**
    * Map Freebit account details response to SimDetails
    */
-  mapToSimDetails(response: FreebitAccountDetailsResponse): SimDetails {
+  mapToSimDetails(response: unknown): SimDetails {
     return Providers.Freebit.transformFreebitAccountDetails(response);
   }
 
   /**
    * Map Freebit traffic info response to SimUsage
    */
-  mapToSimUsage(response: FreebitTrafficInfoResponse): SimUsage {
+  mapToSimUsage(response: unknown): SimUsage {
     return Providers.Freebit.transformFreebitTrafficInfo(response);
   }
 
   /**
    * Map Freebit quota history response to SimTopUpHistory
    */
-  mapToSimTopUpHistory(response: FreebitQuotaHistoryResponse, account: string): SimTopUpHistory {
+  mapToSimTopUpHistory(response: unknown, account: string): SimTopUpHistory {
     return Providers.Freebit.transformFreebitQuotaHistory(response, account);
   }
 
diff --git a/apps/bff/src/integrations/freebit/services/freebit-operations.service.ts b/apps/bff/src/integrations/freebit/services/freebit-operations.service.ts
index f3a4760d..c873b177 100644
--- a/apps/bff/src/integrations/freebit/services/freebit-operations.service.ts
+++ b/apps/bff/src/integrations/freebit/services/freebit-operations.service.ts
@@ -5,16 +5,15 @@ import { FreebitClientService } from "./freebit-client.service";
 import { FreebitMapperService } from "./freebit-mapper.service";
 import { FreebitAuthService } from "./freebit-auth.service";
 import type {
-  FreebitAccountDetailsResponse,
-  FreebitTrafficInfoResponse,
-  FreebitTopUpResponse,
-  FreebitQuotaHistoryResponse,
-  FreebitPlanChangeResponse,
-  FreebitAddSpecResponse,
-  FreebitCancelPlanResponse,
-  FreebitEsimReissueResponse,
-  FreebitEsimAddAccountResponse,
-  FreebitEsimAccountActivationResponse,
+  TopUpResponse,
+  PlanChangeResponse,
+  AddSpecResponse,
+  CancelPlanResponse,
+  CancelAccountResponse,
+  EsimReissueResponse,
+  EsimAddAccountResponse,
+  EsimActivationResponse,
+  QuotaHistoryRequest,
 } from "@customer-portal/domain/sim/providers/freebit";
 import type {
   FreebitTopUpRequest,
@@ -73,7 +72,7 @@ export class FreebitOperationsService {
         ])
       );
 
-      let response: FreebitAccountDetailsResponse | undefined;
+      let response: Providers.Freebit.mapper.FreebitAccountDetailsResponse | undefined;
       let lastError: unknown;
 
       for (const ep of candidates) {
@@ -82,7 +81,7 @@ export class FreebitOperationsService {
             this.logger.warn(`Retrying Freebit account details with alternative endpoint: ${ep}`);
           }
           response = await this.client.makeAuthenticatedRequest<
-            FreebitAccountDetailsResponse,
+            Providers.Freebit.mapper.FreebitAccountDetailsResponse,
             typeof request
           >(ep, request);
           break;
@@ -120,7 +119,7 @@ export class FreebitOperationsService {
       const request: FreebitTrafficInfoRequest = Providers.Freebit.schemas.trafficInfo.parse({ account });
 
       const response = await this.client.makeAuthenticatedRequest<
-        FreebitTrafficInfoResponse,
+        Providers.Freebit.mapper.FreebitTrafficInfoResponse,
         typeof request
       >("/mvno/getTrafficInfo/", request);
 
@@ -159,7 +158,7 @@ export class FreebitOperationsService {
         ? { ...baseRequest, runTime: payload.options?.scheduledAt }
         : baseRequest;
 
-      await this.client.makeAuthenticatedRequest<FreebitTopUpResponse, typeof request>(
+      await this.client.makeAuthenticatedRequest<TopUpResponse, typeof request>(
         endpoint,
         request
       );
@@ -198,8 +197,8 @@ export class FreebitOperationsService {
       });
 
       const response = await this.client.makeAuthenticatedRequest<
-        FreebitQuotaHistoryResponse,
-        FreebitQuotaHistoryRequest
+        Providers.Freebit.mapper.FreebitQuotaHistoryResponse,
+        QuotaHistoryRequest
       >("/mvno/getQuotaHistory/", request);
 
       return this.mapper.mapToSimTopUpHistory(response, account);
@@ -239,10 +238,10 @@ export class FreebitOperationsService {
         runTime: parsed.scheduledAt,
       };
 
-      const response = await this.client.makeAuthenticatedRequest<
-        FreebitPlanChangeResponse,
-        typeof request
-      >("/mvno/changePlan/", request);
+      const response = await this.client.makeAuthenticatedRequest<PlanChangeResponse, typeof request>(
+        "/mvno/changePlan/",
+        request
+      );
 
       this.logger.log(`Successfully changed plan for account ${parsed.account} to ${parsed.newPlanCode}`, {
         account: parsed.account,
@@ -314,7 +313,7 @@ export class FreebitOperationsService {
         payload.contractLine = features.networkType;
       }
 
-      await this.client.makeAuthenticatedRequest<FreebitAddSpecResponse, typeof payload>(
+      await this.client.makeAuthenticatedRequest<AddSpecResponse, typeof payload>(
         "/master/addSpec/",
         payload
       );
@@ -352,7 +351,7 @@ export class FreebitOperationsService {
         runTime: parsed.runDate,
       };
 
-      await this.client.makeAuthenticatedRequest<FreebitCancelPlanResponse, typeof request>(
+      await this.client.makeAuthenticatedRequest<CancelPlanResponse, typeof request>(
         "/mvno/releasePlan/",
         request
       );
@@ -381,7 +380,7 @@ export class FreebitOperationsService {
         requestDatas: [{ kind: "MVNO", account }],
       };
 
-      await this.client.makeAuthenticatedRequest<FreebitEsimReissueResponse, typeof request>(
+      await this.client.makeAuthenticatedRequest<EsimReissueResponse, typeof request>(
         "/mvno/reissueEsim/",
         request
       );
@@ -422,14 +421,14 @@ export class FreebitOperationsService {
         planCode: parsed.planCode,
       });
 
-      const request: FreebitEsimAddAccountRequest = {
+      const payload: FreebitEsimAddAccountRequest = {
         ...requestPayload,
         authKey: await this.auth.getAuthKey(),
       };
 
-      await this.client.makeAuthenticatedRequest<FreebitEsimAddAccountResponse, FreebitEsimAddAccountRequest>(
+      await this.client.makeAuthenticatedRequest<EsimAddAccountResponse, FreebitEsimAddAccountRequest>(
         "/mvno/esim/addAcnt/",
-        request
+        payload
       );
 
       this.logger.log(`Successfully reissued eSIM profile via addAcnt for account ${parsed.account}`, {
@@ -515,10 +514,10 @@ export class FreebitOperationsService {
       Providers.Freebit.schemas.esimActivationRequest.parse(payload);
 
       // Use JSON request for PA05-41
-      await this.client.makeAuthenticatedJsonRequest<
-        FreebitEsimAccountActivationResponse,
-        typeof payload
-      >("/mvno/esim/addAcct/", payload);
+      await this.client.makeAuthenticatedJsonRequest<EsimActivationResponse, typeof payload>(
+        "/mvno/esim/addAcct/",
+        payload
+      );
 
       this.logger.log("Successfully activated new eSIM account via PA05-41", {
         account,
diff --git a/packages/domain/sim/providers/freebit/index.ts b/packages/domain/sim/providers/freebit/index.ts
index 0c17e26b..0d622d65 100644
--- a/packages/domain/sim/providers/freebit/index.ts
+++ b/packages/domain/sim/providers/freebit/index.ts
@@ -47,6 +47,7 @@ export type CancelAccountResponse = ReturnType<typeof Mapper.transformFreebitCan
 export type EsimReissueResponse = ReturnType<typeof Mapper.transformFreebitEsimReissueResponse>;
 export type EsimAddAccountResponse = ReturnType<typeof Mapper.transformFreebitEsimAddAccountResponse>;
 export type EsimActivationResponse = ReturnType<typeof Mapper.transformFreebitEsimActivationResponse>;
+export type AuthResponse = ReturnType<typeof Mapper.transformFreebitAuthResponse>;
 
 export * from "./mapper";
 export * from "./raw.types";
diff --git a/packages/domain/sim/providers/freebit/mapper.ts b/packages/domain/sim/providers/freebit/mapper.ts
index 5e14083c..0bbb75a3 100644
--- a/packages/domain/sim/providers/freebit/mapper.ts
+++ b/packages/domain/sim/providers/freebit/mapper.ts
@@ -8,6 +8,7 @@ import {
   type FreebitAccountDetailsRaw,
   type FreebitTrafficInfoRaw,
   type FreebitQuotaHistoryRaw,
+  type FreebitAuthResponseRaw,
   type FreebitTopUpRaw,
   type FreebitAddSpecRaw,
   type FreebitPlanChangeRaw,
@@ -18,6 +19,7 @@ import {
   freebitAccountDetailsRawSchema,
   freebitTrafficInfoRawSchema,
   freebitQuotaHistoryRawSchema,
+  freebitAuthResponseRawSchema,
   freebitTopUpRawSchema,
   freebitAddSpecRawSchema,
   freebitPlanChangeRawSchema,
@@ -206,4 +208,10 @@ export function transformFreebitEsimActivationResponse(raw: unknown) {
   return freebitEsimAddAccountRawSchema.parse(raw);
 }
 
+export type FreebitEsimActivationResponse = ReturnType<typeof transformFreebitEsimActivationResponse>;
+
+export function transformFreebitAuthResponse(raw: unknown): FreebitAuthResponseRaw {
+  return freebitAuthResponseRawSchema.parse(raw);
+}
+
 
diff --git a/packages/domain/sim/providers/freebit/raw.types.ts b/packages/domain/sim/providers/freebit/raw.types.ts
index af28d5a0..e72a2ef8 100644
--- a/packages/domain/sim/providers/freebit/raw.types.ts
+++ b/packages/domain/sim/providers/freebit/raw.types.ts
@@ -166,3 +166,16 @@ export const freebitQuotaHistoryRawSchema = z.object({
 
 export type FreebitQuotaHistoryRaw = z.infer<typeof freebitQuotaHistoryRawSchema>;
 
+export const freebitAuthResponseRawSchema = z.object({
+  resultCode: z.string().optional(),
+  status: z
+    .object({
+      message: z.string().optional(),
+      statusCode: z.union([z.string(), z.number()]).optional(),
+    })
+    .optional(),
+  authKey: z.string().optional(),
+});
+
+export type FreebitAuthResponseRaw = z.infer<typeof freebitAuthResponseRawSchema>;
+