Problems Pairing with Garmin Nuvi 265W

AJ, I have the exact same problem. Worked like a charm the first day but thereafter it's caught in the on/off loop. However, I haven't registered my Nuvi with Garmin so I don't think that's the problem. My iPhone still says it's paired with the Nuvi.

I had the same problem. I though the unit was defective and returned to its vendor. The second I returned to Garmin. I am in my 3rd one and the same problem is there. I finally realized that the Garmin Bluetooth doesn't like the iPhone 3G. As soon as I unpaired my iPhone, the Garmin worked fine. No Bluetooth, though. I have written and spoken with the Garmin support and true, they don't know what is the issue. It is not the registration. I believe it has to do with the update to the latest Garmin software. It worked until I upgraded and also that cannot be reversed. I am hoping that Apple finds a fix because the iPhone should work with any bluetooth device. After all Apple knows how to work their magic in technology. If anyone has any light to shed, please join in this conversation.

I bought a Garmin 265WT recently and could pair my iPhone 1st generation to the unit but it would constantly reboot the Garmin unit. After reading all the support forums and upgrading to the latest software releases on both my iPhone and Garmin 265WT

I could not get the problem resolved running the below software/firmware:
iPhone 2.2 and 2.2.1
Garmin 4.8 with Bluetooth Firmware 1.7

I finally called Garmin and they shipped me another unit. The new unit worked without any problems even with older software and firmware. Seems as if the reboot problem might be more than just software and firmware related.

My iphone at this point is running 2.2.1 but the below software and firmware revisions of the new Garmin 265WT worked:

The new unit came with software:
Software Version 4.40
GPS SW Version 2.38b
Bluetooth SW Version 1.65

This worked no problem with bluetooth. No reboots....

I even upgraded to:
Software Version 5.0
Bluetooth SW Version 1.7

The unit still worked no problem. I can only suspect the issue here is hardware related in some cases. So for some people the upgraded software/firmware may work. But if you are running both iPhone 2.2.1 (1st Gen Phone) and the latest software and Bluetooth firmware and still have the problem I would call Garmin and have them replace the unit.

I don't know that this will help everyone, but I have a nuvi 285WT that was running v4.8 and would reboot right after connecting to my iPhone (2.2.1). I came home, plugged the GPS in, did the web updater thing, and found an update to 5.0. After doing this update (and the extras that applied to me or the unit) I paired with my iPhone again...and it worked! Phone book and all was there and working fine. I turned the GPS off and on again to make sure I wasn't dreaming and it hasn't had any more issues.

So for those of you with a nuvi 200-series running < v5.0 I'd try upgrading to 5.0 and make sure you select any other firmware updates that apply. Hopefully this will help some of you out. I don't know what the difference between the 265W and 285W are, Garmin doesn't even list the 285W on their site, but updating worked for me.