Polish carrier Plus is offering a chance to grab free Windows Phone-themed sneakers to those who customize their pair in the most creative way.

Polish mobile carrier Plus is setting a new trend for Windows smartphones by printing the customized OS interface on plain white sneakers. The carrier started the competition to celebrate the launch of Nokia Lumia 630 on its network, but does not limit the contest to Lumia 630 buyers. Anyone on Plus network in Poland who has purchased a Lumia handset after March 1 can enter the contest and get a chance to win self-designed sneakers.

The winners of the limited edition Windows Phone themed sneakers will be selected by a jury and 18 winners will be declared each day till the offer ends on June 30.

To get started, Lumia phone owners can choose from three different shoe designs from Plus and use it as a canvas to print the customized home screen. Eligible subscribers must download a free mobile app called 'Trampkomania with Windows Phone' from the official app store. Participants must customize their Windows Phone home screens with the most creative and original theme.

Favorite apps can be pinned to the Start Screen and users can change the size and location of the app to make it attractive. Once the home screen is ready, users can take a screenshot and send it to Plus using the Trampkomania mobile app. The jury will choose the winners based on its creativity, originality, aesthetics and the ability to use the mobile OS in the project. The winners will be notified from within the app.

Nokia announced the low-cost Lumia 630 alongside Lumia 635 at Microsoft's BUILD conference, last month. The 630 model features 3G support and single and dual SIM options. Other technical specifications include a 1.2GHz quad-core Qualcomm Snapdragon 400 processor, 512MB RAM and 8GB internal storage, expandable up to 128GB. It is fitted with a 4.5-inch VGA display with Gorilla 3 ClearBlack LCD and sports a 5-megapixel shooter but with no flash. The handset was priced at $159 at launch for markets including Asia, Russia, India and Europe.

As of this writing, a dedicated contest page shows 630 pairs of sneakers to be won during the period.