Owning a Samsung S2 and S4 coming to acquire, to pass from one to the other, I was looking for a micro sim adapter. After reading many articles on the subject, I turned to this model that has the advantage of having four small notches at the 4 corners and allow to hold the Micro SIM in place. Other models without these notches and that keep the sim with "scotch" inspired me do not trust. In short, the test is successful even if we must take time to insert the micro sim adapter and the S2.