This  phone has a 3.5 inch display with 320 x 480 pixel resolution, that amounts to 165 ppi pixel density, and is not that attractive on a smartphone. In case of Rex 90, it does not seem bad as you hardly get to play games on this handset. Anyway, it's doubtful that anyone would love to watch videos on this handset.

                                          Samsung has implemented many features of smartphones in the Rex 90 to make it user friendly. Like that Rex 90 has a notification bar, which allows users to control WiFi, Bluetooth, and sound and flight modes. You can even access the music app from the notification bar. Besides, there is a provision to delete or place applications on the home page but in the menu page also .you can only arrange apps. 

                  The Samsung Rex 90 gives you GPRS/Edge connectivity. it means that you cannot have a 3G connection on this phone.Samsung Rex 90 comes with a 3.2 megapixel rear camera, and there is no front camera. The rear camera can be used for both video shooting as well as to capture still pictures. The camera app is like that as a Android camera app.

The launch of the Rex series of feature phones from Samsung to compete with the Nokia Asha series handsets. The Samsung Rex 90, on the other hand, performs slowly and does not look that good either.
                                         Rex battery is 1000 mah with 15hrs talktime.So, For this price I give a negative marks for this phone.