There is a rumor going around that Samsung will be revealing the Galaxy S4 in February of 2012. This could have something to do with the fact that Apple has just released their new iPhone, the iPhone 5.
Samsung Galaxy S3 vs Galaxy S4 rumors
The Samsung Galaxy S4 could be launched at the Mobile World Conference, said an employee who did not want to be named. So what might the next generation Galaxy S4 bring to the table that the Samsung Galaxy S3 does not have?
According to the Korea Times and its source, one thing that will change will be the display of the handset which is said to be increasing to 5 inches form 4.8 inches which is on the Samsung Galaxy S3. It is thought that the basic design will not be changed significantly and the rounded corners on the rectangular design will remain.
There is also a rumour that the new handset will have support for global LTE and it will come with the Exynos quad core processor (currently the US variant has swapped its quad-core for a dual-core chip to be LTE compatible).
Apart from this you will have to wait to see what other features the Samsung Galaxy S4 will have. At the moment we do not know what version of Android the device may have but given rumors of a March 2013 launch, it will likely be Android 4.1 Jelly Bean if there is no 5.0 Key Lime Pie coming this holidays.