I bought this cell phone pocket, because I go a lot of jogging and my Galaxy S2 for recording the activity (GPS / pulse) and listening to music is always with you. The shell is very well located on the arm and does not bother me even while running. The sleeve is a little tight cut, which manifests itself among other noticeable that you can plug the phone only in the case when this is not already on your wrist. The operation of the display through the bag through is possible and works without problems. The shell is unfortunately only open on one side, which leads the Galaxy S2 that the display upside either sits or the shell must be worn with the opening facing downwards. The mobile phone then stops but still in the pocket. Possibly a headphone jack on the opposite side of the opening would have been good. The processing of the bag is unfortunately less well. Partly stand out threads and the seams are not always optimally processed. All in all I can recommend this envelope but anyone who wants a functional sleeve pocket, for example, for jogging, need for very little money. For the price you should however not ne plus ultra pocket expect.