in my opinion these are the only sim adapters worth buying, yes you can buy cheaper ones, even packs of 3 etc at lower price but honestly these adapters are the ones that work, the sim clicks into place in a very secure way, making the sim flush in the adapter and therefore a perfect fit into the phone. because of the design the sim will not fall out or slip etc. ive used this adapter with a micro sim in my blackberry phones and my galaxy s2 and tried it in a few other phones, it fits well in all of them. we all know the problems of having a sim come out and jamming in the phone or the adapter jamming in the sim contact pins, so buy these adapters and avoid problems. a very good adapter at a very good price.