Mobile World Congress 2015 is only a few weeks away and leaks regarding a new Microsoft Lumia smartphone have already surfaced. Janela Tech has revealed a document from Anatel; a Brazilian regulatory agency similar to the FCC, the filing dubs the upcoming phone as model 'RM-1109.'

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The filing indicates that the phone will be powered by a BV-T5C model, 2500mAh battery. As this is relatively a large battery capacity for a Windows Phone, it has further fueled rumors that this device is probably the Microsoft Lumia 1330.

Specs of the unannounced device are said to include a 5.7-inch 720p display powered by a 1.2 GHz Qualcomm Snapdragon 400 processor. It might also feature a 14 MP PureView rear camera along with a 5 MP front facing camera; which is becoming quite the norm for low and mid end Microsoft Lumia devices. The device may also come packed with 32 GB internal storage too.

As none of these documents and specifications have been confirmed, we'd advise you take this news with a pinch of salt. With that being said, it is important to note that Janela Tech has been quite accurate in the past as well which leads us to believe that these documents are indeed real.

Source: Janela Tech via Windows Central |Filing image via Janela Tech

Update: Apparently, the RM-1109 is in fact an unannounced Lumia 640. The device will reportedly be a Dual SIM handset with integrated Digital TV which is becoming quite popular in the country. Details are quite scarce regarding whether the Lumia 640 will be exclusive to Brazilians or if it'll see the light of day in other countries as well.