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.
What is the difference between mini SIM and Micro SIM? Mini-SIM Card - The most common in the previous generation of smartphones, it's what most people would call a SIM card. Micro-SIM Card - The now standard for smartphones; much smaller; just about contains the contacts on the back.