diff --git a/src/modules/auth/providers/auth.service.ts b/src/modules/auth/providers/auth.service.ts
index 4e25c17..a702135 100755
--- a/src/modules/auth/providers/auth.service.ts
+++ b/src/modules/auth/providers/auth.service.ts
@@ -61,10 +61,11 @@ export class AuthService {
       await queryRunner.startTransaction();
       //
       const isValid = await this.otpService.verifyOtp(phone, code, "REGISTER");
-
       if (!isValid) throw new BadRequestException(AuthMessage.INVALID_OTP);
 
-      await this.otpService.delOtpFormCache(phone, "REGISTER");
+      const existUser = await this.usersService.findOneWithPhone(phone);
+      if (existUser) throw new BadRequestException(AuthMessage.PHONE_EXISTS);
+
       const hashedPassword = await this.passwordService.hashPassword(completeRegistrationDto.password);
       const user = await this.usersService.createUser(completeRegistrationDto, hashedPassword, queryRunner);
 
@@ -83,6 +84,8 @@ export class AuthService {
         });
       }
 
+      await this.otpService.delOtpFormCache(phone, "REGISTER");
+
       await queryRunner.commitTransaction();
 
       return {