(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 ...

The first step, however, is to check the edges of your device for a small oval-shaped or rectangular cutout with a pinhole inside, as this is where the SIM tray is. Any object or implement with a ...

Another reference mentions "second Sim Tray Status," which indicates that the phone will actually have two physical slots for SIM cards, instead of some software dual SIM solution. The hints in ...