LG Electronics is clearly working on its next flagship smartphone. A document of the alleged LG G4 was spotted online hinting that the handset is in the works and it will reportedly land at AT&T. 

An RDF file of an LG smartphone with model number of LG-H810 leaked online. It is still unconfirmed whether the device is really the much awaited LG G4, but reports state that it's the variant for U.S. carrier AT&T. The handset will feature a quad HD (1440 x 2560 pixels) resolution. Apart from that, other specs and features of the smartphone were not revealed. 

Meanwhile, the alleged LG flagship smartphone was spotted in the benchmark website GeekBench that hints on what could be inside the device. The handset in the benchmark has the model number F510L, which can be another variant of the smartphone. 

According to the listing, the smartphone will be powered by Qualcomm's latest Snapdragon 810 processor. It is most likely that it will run with the latest Android 5.0.1 Lollipop OS, but the company could be waiting for a more stable version of the operating system. 

Latest murmurs claim that the handset will have a 16-megapixel rear camera, which is a big jump from the 13-megapixel shooter in the LG G3, although this is not something tech fans would be excited about since some smartphones in the market already boast the same or even better back cameras.

It was initially thought that the LG G4 will be announced at the upcoming Mobile World Congress in March in Barcelona to battle head on with other Android-based smartphones like the HTC One M9. However, the release date rumor jumped back to May following the previous release date pattern of its predecessor, which was announced in May 2014. Of course, nothing is official yet until LG itself spills the details.