Service mark symbol. The service mark symbol (â ), the letters SM in superscript style) is a symbol used in the United States to provide notice that the preceding mark is a service mark.
Size matters: The micro and mini USB connectors are of similar width. But the micro connector is much thinner (smaller vertical dimension). Some product designs were not able to accommodate the height of the mini receptacle and the new thinner receptacle will encourage and allow thinner products.
Nano SIM vs Micro SIM vs Mini SIM Cards: Ever wondered what the difference between a Nano SIM, a Micro SIM or Mini SIM card are? When the SIM card was first introduced, it came in one standard size but with the creation of thinner and more complicated smartphones, the SIM card has undergone several changes.