Samsung S4 users might want to unlock their phones in order to change carriers. This happens when they are either dissatisfied with the present one or might want to visit another country and use the local network. The first step is to contact you current carrier to see if they will do it for you. If they don’t agree, go to a third party with the IMEI number of the device. This might make the phone warranty void. A lot of online and offline

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