The Fosmon Technology slim-fit case and the E LV CCase are two good cases for the Samsung Galaxy S2. Available on Amazon.com, both cases have received positive feedback from customers.
Made of thermoplastic polyurethane, the case by Fosmon features a matte finish that prevents fingerprints and cutouts to allow access to ports and buttons. The case protects the phone against scratches, dust and minor impact.
The case by E LV features a zebra pattern on the back, a stylus and cutouts for ports and buttons. Made of anti-static silicone, the case protects the S2 against drops and shock. The case comes with a microfiber cleaning cloth.