For a better understanding of sim free pink mobile phones we ought to explain what locked phones are. A locked pink mobile phone is one that can only be used within a certain mobile communication service, while a sim free one allows the freedom to use the mobile as the user sees fit. How is locking possible in the first place? The key element that enables locking or codification is the the service feature of recognizing the SIM (subscriber identification module) card. According to this principle the transfer is possible only between cell phones belonging to the same providing company.
Sim free pink mobile phones have no problem identifying the SIM card irrespective of the service operator. The main advantage of such mobile devices is that one benefits from the chance to change the mobile without having a contract to fear. Just imagine the number of phone users who would like to buy a cellular without being bound to a contract: this is the real chance with sim free pink mobile phones. You can purchase whatever item you want without being confined to a contract. The only thing here is that when you get it independently and unlocked, you pay the real phone value, while when you get it in a contract-based package you pay considerably less.
One further reason why sim free pink mobile phones remain in demand is that users want to switch to another cellular service provider freely, and by preserving their existing mobile. The phone stays the same and you only need to change the SIM card to access a certain service provider network. There are also some disadvantages to using sim free pink mobile phones. The problem could come from the impossibility to access the CDMA network with a SIM phone whether unlocked or not. You can use sim free pink mobile phones within the GSM network, but they will never function for the CDMA.
For the American cellular service providers, you’ll be able to use sim free pink mobile phones with T-mobile and Orange, that run on the GSM, but Sprint and Verizon limit the phone usage to locked devices available within the system. And finally, the main downside to the unlocked variant is the price tag; you can purchase new mobile phones for a low cost when you sign a one or two-year contract. Thus, a locked cell you see advertised with £50, will cost you over £200 in the sim free mode.