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TomTom Now for omnia 900i

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All i900 users who want to have a fast fix!

I have 2 i900 phones and I really have tried almost all suggestions.

The registry change will make TomTom work but often you need to wait long for your i900 to find the sattelites.

In order to find the satellites quickly, you need to change the Phone software using Grandprix.

The best Phone software for GPS reception is version ZHIE1 or PUJA1.

This has changed everything for me.

1) Switch on the motion sensor in settings, system. (easier to edit the registry data)

2) install a registry editor like PHM reg-edit

3) Make the changes as written below

- HKEY_LOCAL_MACHINE\Software\Samsung\RIL\GPS\Accuracy set from 19 to 1

- HKEY_LOCAL_MACHINE\Software\Samsung\RIL\GPS\QOPDelay set from 12 to 1

- HKEY_LOCAL_MACHINE\Software\Samsung\RIL\GPS\RefreshRate set to 1 (default)

- HKEY_LOCAL_MACHINE\Software\Samsung\RIL\GPS\VAccuracy set from 0 to 1

- HKEY_LOCAL_MACHINE\System\CurrentControlSet\GPS Intermediate Driver\Drivers\Samsung GPS Hardware\InputBufferSize: set from 4096 to 512

- HKEY_LOCAL_MACHINE\System\CurrentControlSet\GPS Intermediate Driver\Drivers\Samsung GPS Hardware\OutputBufferSize: set from 4096 to 512

- HKEY_LOCAL_MACHINE\System\CurrentControlSet\GPS Intermediate Driver\Drivers\Samsung GPS Hardware\SleepOnNoData: set from 100 to 0

- HKEY_LOCAL_MACHINE\System\CurrentControlSet\GPS Intermediate Driver\Drivers\Samsung GPS Hardware\RetryWaitOnError: set from 1000 to 0

- HKEY_LOCAL_MACHINE\System\CurrentControlSet\GPS Intermediate Driver\Multiplexer\MaxBufferSize: set from 16384 to 1024

4) Go to your device's registry, and see the key HKEY_LOCAL_MACHINE\System\CurrentControlSet\GPS Intermediate Driver

5) Change the following string values to nothing (don't delete them, just edit them and clear the value):

CurrentLogFile (originally \GPSID_log.txt)

OldLogFile (originally \GPSID_log.bak)

6) Soft-reset your device

7) With File Explorer, go to My Device, and delete the two GPSID_log files you see, and the file named xtra. If you don't soft-reset, you will not be able to delete some of them.

8) Check again the registry setting. Sometimes in rare cases it may revert the settings back - but that's a general WM problem.

9) Go to Settings > System > Enhanced GPS and set both settings to "Disable"

10) external GPS settings: Programs COM3 Hardware COM9 4800 Access activated

11) Launch the phone keyboard

12) type in *#1472365#

13) go to menu go to setting and make sure GPS is on Standalone, Hot start, Navigation, press ok.

14) go to menu go to setting and make sure QOS is on 1,1,2,1,0 and press ok.

15) go to menu go to setting and make sure XTR is on Disable, Disable, Enable and press ok.

16) go to menu go to setting and make sure NMEA logging and check if both paths are empty and press ok.

17) To ensure quick GPS locking it is best to ghange the phone version using Grandprix.

I am testing 2 versions now, PUJA1 and ZHIE1 (Phone bin files)

For more info on how to do this go to this page.


In stead of using the loader, pda and CSC in line 7 of the above mentioned webpage only add the Phone bin file.

Make sure windows 7 has found the phone and if the samsung driver is installed for the first time wait for the found i900 phone after installing the driver before flashing.

Connect and disconnect the phone from your computer if it takes a while.

This to prevent your computer from finding the phone while flashing!

Do not use USB extension cables, they might disturb the signal.

Also make sure the phone battery is charged.

After this a cold start and a lock within 1 minute.

Maybe you have to test several com ports to find the best one for TomTom.

Good luck and remember all of the above is always at your own risk.

I did this on 2 I900 phones and it worked the first time.

Hope this helps


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