How to unlock and upgrade for free:
Garmin Nüvi 55/56/57/58, Garmin Nüvi 65/66/67/68, Garmin Nüvi 55TV
Garmin: nüvi® 2599LMT-D, nüvi® 2589LM, nüvi® 2569LMT-D, nüvi® 2559LMT, nüvi® 2529LMT-Dnüvi®, 2519LM, nüvi® 2699LMT-D, nüvi® 2659LM
You will be using Universal Firmware Patcher for Protected Garmin Devices
You will undergo the following process by taking full responsibility for your actions. This method has the potential to brick or damage your GPS beyond repair.
Your GPS battery should be fully charged or powered to at least 70% of its capacity.
Make sure you follow the exact steps mentioned below.
It is recommended to read the steps of unlocking multiple times until you are absolutely sure you understood the process. Once you’re ready, proceed towards unlocking and updating your GPS.
You will need the following software available for download in the link below.
Link : http://bit.ly/2goS4aZ
Link : http://bit.ly/2e0LLvc
Once you have successfully downloaded the software, install USBDrivers_2311.exe then install WebUpdater_WindowsXPSP3andnewer__256.exe.
Extract IMGPatcher_v11.zip, RGN_Tool.rar and Updater.rar into “Unlock nüvi 57” folder.
The first step towards unlocking your GPS is to switch its internal memory to Mass Storage mode.
Once you’ve switched to Mass Storage, the folder .System must be made visible to the computer you’re about to connect your GPS to. You should use this method.
Connect the GPS to the computer via USB cable in order to update it to the latest version by using WebUpdater. If your GPS is already using the latest available firmware, you still need to reinstall it. This is necessary in order to be absolutely sure you are running the latest version and in order to be able to overwrite GUPDATE.GCD file.
There are cases when the GUPDATE.GCD does not exist, cannot be deleted due to corruption or isn’t compatible with the GPS device.
Once the update is completed, press Cancel, unless you want to update other files on the GPS, case in which you should press Next.
Once the software has been updated/reinstalled turn on the GPS and wait for the main menu to show up. At this point, connect the GPS to the computer. Access the internal memory of the GPS and navigate to .System folder then search for GUPDATE.GCD. Move the file on the desktop in the “unlock nüvi 57” folder. Make sure GUPDATE.GCD is no longer available in the .System folder.
It is critically important to make sure that you have removed the GUPDATE.GCD file from the .System folder. If the file might still exist there, the unlocking software might not work, or worse, will brick your device.
Open FirmarePatcher.exe and by using “Browse…” select GUPDATE.GCD from “unlock nüvi 57” folder available on your desktop. Once the software confirmed the patching by displaying “File patched successfully”, close firmwarePatcher.exe by clicking on the X button on the top right corner.
A new file called GUPDATE_Patched.GCD will be created in the folder on your desktop.
Open RGN_Tool.exe and press “Open GCD/RGN file”. Select GUPDATE_Patched.GCD from the folder on your desktop.
Make sure you make no change to RGN_Tool.exe’s settings; otherwise you will brick your GPS. Once you’ve opened the file, it is now required to save it using RGN extension. To do this, press “Save enabled sections to RGN file” and save the result in the same folder on your desktop.
You will have to wait a minute or so after pressing the “Save” button, then RGN_Tool.exe will automatically close.
RGN_Tool.exe app will create a GUPDATE_Patched.rgn file in the folder on your desktop. Rename the file into 570.rgn. You may rename the file as you wish as long as it’s less than 4 characters and ends in RGN extension.
In the “unlock nüvi 57” folder on your desktop you shall find Updater.exe app.
Right click on it, select properties and then choose the Compatibility tab. Check the two boxes as shown in the picture below and then press Apply and OK.
Once Updater.exe is configured, use drag-and-drop to place 570.rgn file over the app, and it will automatically launch. Once it’s turned on, make sure you check the “USB Device” box.
Now the app is ready to install GPS unlocking firmware that will allow you to install new maps.
Make sure once again that there is no GUPDATE.GCD file in the .System folder on your GPS! If it hasn’t been removed, it will cause Updater.exe to fail and possibly brick your Garmin GPS.
You now need to set your GPS into Preboot Mode. To do this, turn off the device (not standby). Press the upper left corner of the screen and connect the device to the computer via USB cable.
Keep your finger on the screen at all times.
Don’t move the finger from that point (you will brick the device)
Take the finger off that point only when the software has been successfully installed.
The Updater.exe app will inform upon completion by displaying “The update was successful.”
This is how your GPS should look like in Preboot mode, when installing drivers.
Once the device has been recognized by Updater.exe it will display the name of the GPS as seen below.
Make sure the .System folder in your GPS no longer contains GUPDATE.GCD to avoid bricking the device.
Press the OK button in Updater.exe once the device was recognized by the app Once you’ve pressed the OK button in Updater.exe, there is no coming back from the update. Preboot mode requires quick action so you will need to step up a notch when doing the process. If however you’ve failed to connect, just restart the process of connecting in Preboot Mode.
How to add free maps on Garmin Nuvi 55/56/57/58
Use gimgunlock.exe to unlock your maps by dragging and dropping the map files over the app.