SIM card (subscriber identity module card )is the card that was in a smartphone for keep certain data such as the user's phone number.
Kind of SIM CARD in iphone
- Original iPhone : SIM
- iPhone 3 g : SIM
- iPhone 3GS : SIM
- iPhone 4 micro-SIM:
- iPhone 4S : micro-SIM
- iPhone 5 : nano-SIM
- 5 c : nano-iPhone SIM
- 5S : nano-iPhone SIM
- the iPhone 6: nano-SIM
- the iPhone 6 Plus: nano-SIM
what is sim lock ?
It is a feature that uses SIM to tie the mobile phone to a specific phone company. In conclusion you can not change SIM Card freely.
This is done in part because phone companies often subsidize the purchase
price of phones, and because they want to lock customers into using
their service. Phones without SIM locks are called unlocked.
You can open the SIM CARD by force with a software.
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