LG announced that its flagship Optimus G has now racked up more than 1 million sales since it was launched just under four months ago, but it seems the Korean company may already be planning a successor. The Optimus G Pro has been revealed in a leaked slide, and it comes with a number of improvements over its predecessor, including a larger 1080p display, a faster quad-core processor, and a bigger battery.

The Optimus G Pro’s display will measure 5 inches, according to the slight, making its 0.3 inches bigger than the Optimus G’s display. What’s more, its 1080p (1920×1080) resolution provides it with an even greater pixel density. In addition to the new display, the Optimus G Pro will have a 1.7GHz quad-core Snapdragon S4 Pro processor, 2GB of RAM, 32GB of storage, and LTE connectivity.

The device is also expected to get a 13-megapixel rear-facing camera — like the Optimus G — plus a much-improved 2.4-megapixel front-facing camera. The slide also mentions a large 3,000 mAh battery.

It’s unclear when the Optimus G Pro could make its debut, but considering its predecessor only launched back in October — or November in the U.S. — we’d be surprised to see it before the summer.

• SourceEngadget