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Warning: those guides are mostly obsolete, please have a look at the new documentation.


Hacking your TomTom device
Tested with TomTom ONE version 1 and TomTom ONE XL (version 3)
Note. simply use different email addresses for each TomTom device you've got. I have no idea why customers are supposed to link only one device per email, it is stupid.
System installation
- Fetch and install TomTome HOME
- You can backup your device's content using the application, but in the end one just needs to specificly backup MapSettings.cfg manually from the map folder to keep your favorites
- Format it's internal memory or SD card as FAT32 with default block size and remember its size (1GB internal, 2GB SD or 4GB+ SDHC?)
- Install the base application with default voices and its updates using the application (reboots several times)
Uncheck the box and skip backup-before-install every time
On ONE XL there is 6.594 ==> 7.162 ==> 8.010
(eventually accept to share informations anonymously)
- Once it's all updated, check the exact application version into,
Manage my model_name > Items on device / Applications: more info
==> I had v7.903 on a tomtom one v1 nov 2012
==> I've got 8.010 on a tomtom one XL mar 2015 and still on apr 2016
(optional) Updating the boot loader and switch to SDHC
For legacy TomTom devices like ONE, the official TomTom SD compatibility list says you are stuck with 2GB traditional SD card. However, updating the booloader does the trick, you can use SDHC.
- Read TomTom Bootloaders and fetch the relevant archive. For ONE/XL it's 5.51x.rar --> 5.5136.
- Extract it and put the "system" file on device's internal storage root filesystem
- Copy all the content of the internal storage to a local folder on your computer.
- Eject the device using tomtom home, it will reboot.
o when asked to connect to computer say no and shut it down
o you can now plug in an SDHC (don't forget to put the lock up to allow read-write) and format it as FAT32 with default block size
o proceed with the map installation & FastActivate (see below)
o copy back all the content do the SDHC, eject the device and reboot
o eventually check withg tomtom home that updates are all done
Installing free maps
- Check for the latest official map version number
==> as for apr 2016 it's 965
==> actually there's also 966 available already but let's much less choice. I am not sure why 965/966 goes together in the forum threads.
- Look at the compatibility charts at for that major map number and choose the one corresponding to your application version,
. preferably with IQ routes
. otherwise w/o IQ routes and w/o Cspeech
==> so for me it's 965.-7252,80,81,82,-7376,7404
==> or 966:
966.7376 has cspeech & tss vocalizer
966.7404 prefered
966.7443 prefered
- Download that precise map at or, extract it to place the map folder at device's root folder. Note. If you've got an old device with only 1GB and didn't manage to upgrade your boot loader (see above), you need your country map or the special 1GB continent maps. Note. if you find direct attachements or torrent/magnet links, it's much faster ; otherwise you might prefer to just take your country or the light 1GB version for smaller size.
- Download the latest FastActivate at, place it at device's root folder and run it step by step as it advocates down to the Quickfix step
- Now that the map is up and running,
o disable auto backup in TomTom HOME settings -- advanced tab
o update your device to get very latests QuickFix GPS optimizations
o install a voice (e.g. Bonnie US) if you got no voice installed yet
- Eventually setup additional PIOs against speed cameras.
Safely disconnect the device from the computer, you are now ready to hit the road.
See for user-end configurations.
Other places to find maps:
Map version history:
Thread: xxl540 map help needed newbie.
GPS Tomtom

(obsolete, see the new doc)