(Subscriber Identity Module lock) A function in GSM cellphones that restricts the phone's use to a particular cellular carrier identified by a SIM card. SIM locks are used to ensure subscribers finish ...

This SIM card unlocking post is presented by iToolab. iToolab has released a new tool designed to quickly and easily let you unlock your iPhone or other smartphone’s SIM card and even switch cellular ...

Every smartphone is either locked or unlocked, depending on where you buy the device from. When you acquire a new mobile phone directly from a U.S. carrier like AT&T or Verizon, it will be locked to ...