With the Samsung Galaxy S3, the most popular Android smartphone of 2012, having been around for six months now, rumors about its successor have already started gaining momentum.

The so-called Samsung Galaxy S4 rumor mill got heated up Friday when a new report, coming straight from South Korea, hit the web saying that the next generation Galaxy S smartphone would be released in April 2013 with S Pen functionality.

South Korean website Enuri reported that Samsung was busy with efforts to introduce Galaxy S4 with the release date planned for April, 2013. The report suggested that the company wanted to bring Galaxy S4 in the same line as its Note series with features like the S Pen and a massive 5-inch AMOLED display with Full HD 1080×1920 resolution (441 ppi).

In addition, the device was also rumored to be powered by EXYNOS 5440 quad-core processor and would feature a 13 megapixel camera. The report also stated that the Galaxy S4 would have a chunkier body with 9.1mm thickness, which is quite thicker than the current Galaxy S3 model that is only 8.6mm thick.

However, more interesting is the fact that Galaxy S4 could share the big guy Galaxy Note’s S Pen feature. But the question is whether the users want an extra piece of technology with the device.

“The need to look after an extra piece of technology, and a small and easy-to-loose one at that, might be quite off-putting to some users,” said a Redmond Pie report.

SamMobile also gave similar views saying: “The biggest question is, will you use the S-PEN? We don’t think so.”

On Wednesday, another SamMobile report said that it had obtained the first model numbers of Samsung’s new high-end device -- the Samsung GT-I9500 and GT-I9505 (probably, a LTE version). Considering that number four is believed to be unlucky in Korea, the report suggested that the GT-I9500 could be the Galaxy S4 smartphone.

On Thursday, a concept video of the Samsung Galaxy S4 from Rozetked appeared online, highlighting two exciting features – a very thin form factor with a bigger screen and a “projected keyboard,” allowing the phone to project an image of a keyboard on a flat surface and then let the user type using the projected keys.

Check out the video here.

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