Here is what we are hearing about Samsung Galaxy S4. This fierce offering of Samsung may have a full HD OLED panel which would be called Green PHOLED. If that be the case than efficiency of Samsung Galaxy S4 would go up by 25% as compared to Samsung Galaxy S3.

However it could be possible that instead of PHOLED it is FOLED which is an acronym for phosphorescent organic light-emitting diode. Phosphorescent diodes are more efficient than fluorescent ones. Till now Samsung is using latter ones but we hope that with Samsung Galaxy S4 things would change.

Also a new video of Samsung Galaxy S4 has emerged which clearly show the new feature TouchWiz on the screen of phone and the video divulged that Samsung Galaxy S4 may have a 2,600mAh battery so that the device would last a day at least.