Ever since the Nexus 5, Sprint seems to be ever more accepting of unlocked devices designed to work on its network. As of right now, there are nine unlocked, SIM-free phones that Sprint allows, and that number will likely grow with each passing year. While this is a great thing, there are definitely some obstacles with getting a SIM card which, in turn, can make activating one of these devices a less-than-pleasurable experience.
Some Things To Know Regarding SIM Cards When Activating An Unlocked Device On Sprint was written by the awesome team at Android Police.
Source: Andriod Police