Nüvi ® 3790T Sg/My,Chinese and Taiwan software versions summary

I found this info from other webboard. I will copy the message to show here below.
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The very nice feature you won't find in any 37xx other regions.
You can tell 3790CHN what exactly road you are driving on.
For example :: when you are driving on ordinary road and there are express way above & frontage road beside.
If 3790CHN is saying the wrong road that you are, you can correct it.
Just press on the green bar at bottom then you will see the choice of the other roads (as possible.)
From picture , if you are driving on express way not ordinary road so just press on express way name at left upper corner then nuvi will recalculate as you are driving on the express way. !!

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Can I flash my 3790TUS 4.3 to 3790CHN 2.5? Is CHN 2.5 the latest version for CHN?

Yes, CHN v2.5 is the latest. Flashing a US 3750 works, but nobody really suceeded in converting a 3790. Everybody gets a "continuous rebooting" issue.

Oh, that's too bad. So which would be the best firmware for the 3790?

Also, is the JCV for the Philippines locked and can't be used with a 3790US? Because I just get a gray square box in the center when I use that file.

@kevindd992002,

Now that I think of it, it is possible that the CHN v2.50 works for the 3790. I was probably confusing with the Sg/My. You know what, why don't you try and let us know. Make sure to read the entire thread.

No, CHN2.50 make 3790US reboot.
I tried with
1).original US boot 2.50 and 3.60 + CHN220resources.bin + CHN220fw_all.bin(override to 1101) --> Rebooting loop
2). Original CHN250 .gcd --> system software missing
3).Modified CHN250 .gcd --> system software missing
even CHN2.50 boot.bin contain 3 hwid-swv( EF 04 FA 00 ) as US boot.bin

@aekhong, so how will I be able to use my Philippines.JCV? Which firmware do I need?

Maybe you need fw update for 37xx Philippines. (Do we have 37xx Philippines ? <-- I don't know this info.)

As far as I know, there is no 37xx Philippines firmware. All the 3790T here are 3790US. The only Philippines-specific Garmin available here is the 1360. Do you think that JCV is only for the 1360?

Hi kevindd992002
Something like that.
For example ., Thai JCV is for firmware of 1460TH / 1360TH/1250TH/3770TH/2575TH not for 24xxUS
You need the same series as sell in Phillipines(Then you can get Phillipines fw to modify) (and a good luck for converting your unit.)