APPLE iPhone and Apple iPad SIM card check card pin， take the card pin can easily remove the SIM card， mobile phone numbers if you want to change or replace the SIM card. This product made of stainless steel， easily deformed and oxidized， precision manufacturing.

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 (small card)， the majority of the early use of smart phones; Finally NANO (mini card)， the majority of new smart phones using this specification， the smallest.

If the turn card before use， 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.