Windows Phone 8.1
LG's Windows Phone 8.1 handset to feature 5in screen.

The features of LG's upcoming smartphone powered by Windows Phone 8.1 have been leaked.

At the Mobile World Congress event scheduled in February, Microsoft's Joe Belfiore announced that the next version of Windows Phone, Windows Phone 8.1, would arrive in the spring.

He also mentioned the hardware partners for the new Windows phone operating system and among them are Lenovo and LG. The others are Nokia, Samsung, Huawei, ZTE, Foxconn, Gionee, JSR and Longcheer.

LG and Lenovo are currently manufacturing Android smartphones. In 2010 LG released a number of Windows Phone 7 handsets but stopped them after the Windows Phone 8 was introduced, reports PhoneArena.

Now, Alan Mendelevich, the founder of AdDuplex network has revealed via Twitter that a mysterious LG device running Windows Phone 8.1 has been spotted in their network's database.

He further claims the LG's handset will carry model number D635 and sport a 5in screen with 720p resolution.

Earlier in May, evleaks posted a photo of the LG's Windows Phone 8.1 handset dubbed LG Uni8, expected this year. The leaked photo suggested LG Uni8 would not have any hardware button but only on-screen navigation keys. Besides, the handset would be thinner.

LG then reportedly denied the reports saying this was not the Windows Phone 8.1 handset expected to be released this year.