A startup based in Singapore, Pixaroll is announcing that they are bringing photo printing/delivery service to Windows Phone platform! Unlike self-served printing from consumer photo printers, Pixaroll delivers top quality prints with accurate color reproduction by using professional printing machines with papers equivalent to photo labs. Here are some comparison. *Do note that the final prints are matte finish and digitized with a mobile phone, hence the differences in grains, contrast and exposure from their digital copy. They look almost identical to the digital copy in real life, I promise you. 
Pixaroll is capable of delivery not only 4" x 6", but 4" x 4" borderless prints which fits instagram’s photo form factor. Delivery in Singapore takes around 2 days, and 7 days for countries outside Singapore. The list of countries which Pixaroll currently ships are as follow
- Japan
- Hong Kong
- Thailand
- Malaysia
- Philippines
- Indonesia
- Australia
- New Zealand
- US
- Singapore
Download Windows Phone Pixaroll app here or scan the QR Code from your mobile phone 
If you have more queries, contact Pixaroll via their FaceBook Page