Fuction:1.Standard SIM Card to Micro SIM cardEg. iPhone 4/4s   Nokia  HTC and so on...2.Micro SIM Card to Nano SIM CardEg. from iPhone 4/4s to iPhone 53.From standard SIM card to Nano CardNeeds two steps:Standard SIM card---Micro SIM card---Nano SIM Card4.From Nano SIM Card to Micro SIM cardEg.

Fuction:1.Standard SIM Card to Micro SIM cardEg. iPhone 4/4s   Nokia  HTC and so on...2.Micro SIM Card to Nano SIM CardEg. from iPhone 4/4s to iPhone 53.From standard SIM card to Nano CardNeeds two steps:Standard SIM card---Micro SIM card---Nano SIM Card4.From Nano SIM Card to Micro SIM cardEg. from iPhone 5 to iPhone 4/4s by using the adapter5.From Nano SIM Card to Standard SIM cardEg. from iPhone 5 to standard SIM card cellphone by using the adapter6.From Micro SIM card to Standard SIM cardEg. from iPhone 4/4s to standard SIM card cellphone by using the adapter