Putting on the mobile version of WGT is much easier than the PC version. The meter is much smoother on the mobile version.
Here is a great way to putt on the mobile using the vertex line method. Go here and take a look at Tekoma's Putting Techniques- http://www.wgt.com/forums/t/226749.aspx It will open in a new window for you.
Here is a break down of how I use the Vertex line method on the mobile version.
You will need to go to the putting green and practice. Remember when you take a mulligan it adds 2 hits to your ball. So you may want to use the stater ball when you practice this.
Hope this helps your mobile putting.
Gary