Applicable Models

IMPORTANT: This file is only for use with the models identified. Not all models are sold in all countries.

This information is for the following models:

  • VPCZ2390X

About this download

Benefits and improvements

This utility installs the originally shipped version of the LTE Registry Patch.

System Requirements

Operating Systems

  • Windows® 7 64-bit

File Info

File Name

  • EP0000551423.exe

File Version

  • 1.0.0.10180

File Size

  • 4.67 Mb

Release Date

  • 01-12-2012

Before You Start


Important Notes

  • NOTE: This package is for WWAN models that have the LTE module.

  • IMPORTANT: To ensure the proper function of the Wireless WAN system, if you have performed a clean install of the Windows® 7 operating system (i.e., installed from a commercial, off-the-shelf, version rather than using the Recovery Wizard or Recovery Media Kit), please insure the following components are installed in the order listed below:

    1. Sierra Wireless WWAN Modem driver (Wireless WAN driver)
    2. original device drivers from the Sony® support site
      Note: It is not necessary to revert to the original drivers if you have properly installed updated drivers from the Sony support site
    3. Sony® Shared Library
    4. Sony Notebook Utilities
    5. VAIO® Smart Network
    6. VZAcess Manager (EP0000551421.exe)
  • During the installation of this file, be sure that you are logged in as the Administrator or as a user with Administrative rights.
  • To ensure that no other program interferes with the installation, save all work and close all other programs. The Taskbar should be clear of applications before proceeding.
  • It is highly recommended that you print out these instructions for use as a reference during the installation process.

Download & Install


Download and Installation Instructions

  1. To ensure that no other program interferes with the installation, save all work and close all other programs. The Taskbar should be clear of applications before proceeding.
  2. Download the EP0000551423.exe file to a temporary or download directory (please note this directory for reference).
  3. Go to the directory where the file was downloaded and double-click the EP0000551423.exe file to begin the installation.
  4. At the "User Account Control" screen, click "Yes".
  5. If the "Select Language" screen appears, select the language you wish to use, and then click "OK".
  6. At the "Select Country" screen, select the country for this installation, and then click "Next".
  7. At the "LTE Registry Patch Ver. 1.0.0.10180" screen, click "Next".
  8. At the "License Agreement" dialog, read the agreement, then, if you agree, click "I Agree" to continue with the installation.
  9. At the "Finish" screen, click "Finish".
  10. At the "This system must be restarted to complete the installation" screen, click "OK" to restart the computer.

After the computer restarts, the installation of the LTE Registry Patch is complete.