Just a day after Nokia unveiled Lumia 920, the firm has issued an apology for a fake advert after that appeared to have been shot using the flagship smartphone was revealed to have been filmed using professional equipment.  

The advert showed a man filming his girlfriend using the new smartphone while both of them were riding bicycles.  

The footage taken from professional equipment looked like it was the video captured using the new Nokia device.  

A split-screen sequence then showed what the smartphone's footage would look like with Nokia's optical image stabilisation feature turned on and switched off.  

The footage was intended to support the firm's claim that its technology helped reduce image blur. According to the BBC, the Verge tech site revealed the issue after it noticed a window reflection revealed a cameraman holding what appeared to be an SLR camera. The Verge's article said, 'too bad it''s faked'.   According to the report, Nokia''s blog acknowledged the problem in a post titled 'An apology is due'.