Google announces that WAP mobile ad will no longer be supported with AdWords. It means you won’t be able to create or use WAP mobile ads any more, and if you are already using such ads in your AdWords campaigns, they will stop serving. You will need to create another ad from the available options.
I would say it’s a good move. Mobile technology have come of age now and as a result there is no need for a specific WAP ad format. There are more efficient ad formats which can be used for better results on mobile devices.
Here’s what Google says –