Both adapters are manufactured very precisely. The nano-SIM card is held firmly and not fall out on its own. Inserting both an iPhone 4 (as a micro-SIM), as well as in an old mobile phone from Nokia (than standard SIM) are possible without problems. The cards are recognized by two phones at once.
As a very positive notices that both adapters are not too thick. Here I have made particular with previous adapters for Micro-SIMs rather negative experiences.
From me therefore a clear buy recommendation and 5 star.
