MICRO adapter card can become the standard calories， riser using engineering plastic (PC) manufacturing， each using CNC precision engraving， easy to bend and deform， high-quality manufacturing; non-using general plastic injection molding， easily bent and deformed ， or have burrs and other undesirable phenomena.

Based on the current standard， SIM Card card distinguish three sizes， namely STD (Standard standard card)， the old model mobile phone use， the majority of 2G or 3G mobile phone; otherwise MICRO card (the card)， the majority of the early use of smart phones; Finally NANO (small card)， the majority of new smart phones using this specification， the smallest.

Before using this turn card， make sure your mobile phone is good specifications; cut card SIM card， you must check for uneven (flash)， or uneven， if there is such a situation， be sure to grinding and whole flat， or otherwise into the phone easily Kaka， or in the future can not exit predicament; another area SIM card gilded (Goldfinger)， try to avoid contact of the water or oil， can prevent oxidation or bad.