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.
NOTE: These are micro or nano SIM cards. The micro SIM is compatible with the iPad and iPhone 4 and 4s while the nano SIM is compatible withthe iPhone 5. If you have a different phone or device that requires a normal size SIM card please click HERE.