When the phone is unlocked, just open the SIM card and replace it with another SIM card (this SIM card may be a map from another country if you want). Some smartphones can even be sold when you buy them from a carrier store full of price without signing a contract that shows how stupid that argument is. People also do not have to wait for a contract to buy a new phone; You can remove the Subscriber Identification Module (SIM) card from an existing phone and insert it into a new phone when it is ready for exchange. Factory-Locked Phones Some phones are designed for a particular mobile phone provider and are connected to the network mobile phones. Geeky Guides Unlock Phone on this page. Someone can actually choose a cheap, functional packed phone that is unlocked by default, and will forget about locked mobile phone problems. How To Unlock Disabled Iphone 3g here. How can I know if a mobile phone is locked or unlocked? If you have two mobile phones in front of you and one of the phones is unlocked while the other is locked, how can you tell them from each other? Unlocked phone will probably find that the provider is less likely to solve phone problems, as it is not owned by the network. Verizon 4G LTE Unlocked Unlocked One thing to keep in mind when it comes to software phone locks is that all Verizon 4G LTE smartphones are unlocked from the box. So, if you sure that you staying with your carrier for a while, you should not buy an unlocked phone a lot. Unlocked GSM Phones Quote from Dzhery914 According to T-Mobile, will they unlock the phone after me after six months (from the beginning of my contract?) And I free to use the phone with who I am.