Is it possible to install WM 6.1 on Treo 700Wx?

yes, it sure is...im running the offical Palm update now

Palm - Support - Treo 700wx Updater 1.24 for Verizon Wireless smartphones

Verizon only right now ! !!!

Do you know if that update can be installed on other carriers phones?

Here is the link for the upgrade:

Palm - Support - Treo 700wx Updater 1.24 for Verizon Wireless smartphones

Is that update just for the verizon phone?

Just to clarify ... this is a WM6.0 upgrade, not WM6.1.

I created an updater by combining the Sprint 5.0 Updater with a 6.1 Rom!
(And this is the true 6.1 and not 6.0!)

This updater works for any carrier since it does not affect the provider radio settings, it upgrades the Operating System. I removed the Sprint Radio Settings, so your current carrier settings will stay put and not be affected by the upgrade!

Example: I have Sprint for a carrier, whom didn't even provide a 6.0 upgrade I may add, and I am running 6.1 on my phone now and am loving it even more!

Basically all you do is format an SD Card to Fat32, copy my files to the SD Card and upgrade your phone using the SD Card method. (I provide step-by-step instructions on how to do it.)

I do charge only $10 for the upgrade, a minor price to pay for all my work and to have your Treo 700W/wx (any carrier!) running the latest and greatest OS!

So for only $10 and about 15 minutes of your time, you can upgrade your 700w/wx to Windows Mobile 6.1!

Download it here: Windows Mobile 6.1 Upgrade for TREO 700wx

My name is Matt Cohen.

I'm in the US Army. We are tryng to update a Treo 700Wx to windows mobile 6/6.1. We bought a qualcomm cdma base station. We need to make this phone work in our private cell network. In your ROM does it make it possible to find other networks besides Sprint/Verizon? I will pay the 10 bucks if you help me. This will help warfighters. Thanks for any help you can provide!

SFC Cohen