We've known for some time that a new Samsung Galaxy S smartphone has been in the works. Past rumors suggested a possible April 2013 launch date for the Galaxy S4; however, a recent scoop by Samsung-enthusiasts Sammobile indicates a far more precise date of release: April 15. It's likely we'll see an announcement in March at one of Samsung's "Mobile Unpacked" events.

Alongside a supposed shipping date, Sammobile also claims to have more granular details about the Jelly Bean device.

For starters, the Galaxy S4 will sport a high-capacity 2600mAh battery. That's definitely a step up from the S3's 2100mAh pack, giving the S4 a roughly 20 percent advantage over its predecessor in terms of battery power. The new phone is also rumored to feature wireless charging, likely the fruit of Samsung's involvement as a founding member of the A4WP (Alliance for Wireless Power) consortium.

Earlier rumors indicated the S4 would pack a quad-core Cortex-A15 processor, 2GB of system RAM, a 13MP rear camera and a sizeable 5-inch 1080p display. The latest information corroborates most of those specifications, but upgrades the CPU to eight cores with an eight-core Mali-T658 GPU and a Super AMOLED display. The S4 will supposedly ship in white and black.

The smartphone has been known internally as "Project J", but that appears to have changed to "Altius" recently. It's suspected that the Galaxy S4 will actually be branded as the Samsung Galaxy S IV, especially since the company has used roman numerals in the past for the S III and S II.