Install the software on your phone using these instructions.
Find the ZoneTag application on your phone. It’s probably in Applications and looks like this:

Once you launch it, set your default access point. It’ll probably be StarHub.

Select that and click OK. You’ll then be taken to this prompt:

Now you have to get your ZoneTag code.
Put the phone down for a moment and go back to your computer.
Go this webpage and click on Get your code:

You should see something like this:

Enter this code on the phone.

And then hit OK.
Now go outside to where there’s a clear view of the sky with as few buildings and trees in the way as possible.
Now click the Options button and GPS and then Connect:

Hit Select. You’ll see a screen like this.

After a few moments you should see a GPS fix appear.
When you do, click Back.
Now open the shutter on the phone’s camera.
Click Options, and then Take pictures.
Take a photo.
Shortly after taking the photo, you should see a message pop up like this:

Click Yes.
You’ll then be prompted like this.

In the Photo location field select <Make ZT Guess>

Now post the photo. Check your Flickr page to see whether it worked OK.
The service is experimental, so there’s plenty of trial and error.
If it uploads with all the right tags, it should look like this one.
Notice all the tags on the right under Show machine tags:

There are both GPS data and the cell tower data to pinpoint it pretty accurately.
Click on the map link to check:

It’s pretty close:

or view it as a satellite image:

[...] ZoneTag: Taking and Tagging Photos [...]