Samsung's next generation next smartphone Samsung Galaxy 4 is coming in April 2013. Samsung next smartphone will be thicker with s-pen feature. We already saw the performance of Samsung launched Galaxy S2, Galaxy S3, Note I and Note II. They already got huge market worldwide. But this up coming device must be a rumor. There is no any strong information that Samsung Galaxy S4 is coming in April after Samsung S3.Still we don't know what will be the next smartphone from Samsung. Different people are thinking different way.
May be those previous market succeed device will inspired Samsung to release a new smartphone and that will be coming soon. Rumor says, Galaxy 4 will come with 5 inch AMOLED display called "Grand AMOLED Display" with full HD 1080X1920 resolution, quad-core processor and 13MP camera. The phone will be Android 5 Key Lime Pie.
So we can think that Samsung Galaxy IV design will be likely Galaxy SIII. Also Samsung must think about its big competitor Apple. For the real news we have to wait until when the device will be launched. Hopefully it is going to release very soon.