Samsung is known to produce good, solid phones with great build quality. The Samsung Galaxy R (I9103) is a good phone with decent Dual-core 1 GHz Cortex-A9 CPU and 1 GB of RAM.
However to harness the true potential of this device you must Root it. To Know more about rooting click here. Before you head over to continue with this tutorial I would advice you to see this article to learn how to backup data before rooting.
This is a very simple method to root your Galaxy R in about 5 minutes at the tops. This requires your phone to be running on Android Version 4.0.4(ICS).