All devices when purchased from your carrier are sim-locked for use only on their current services. My services allows the use of other providers without the need of your carriers' permission or authorization. Once unlocked either thru unlock code or process instructions, the device is globally unlocked for all carriers. The service is permanent and is only needed to be applied once for the lifetime of the device. The benefits of this service includes the use of all global carriers while indeed increasing the resale value of said device as it will accept a majority of global sims.
The service I offer is simple. I will factory unlock your Sprint iPhone. All models are accepted. Models ranging from iPhone 4s, 5, 5c, 5s only. This service is guaranteed to work. All IMEIs accepted regardless if blacklisted, unpaid, financed, etc.
The unlock process takes up to 7-10 days in rare cases it can take up to 15 days.
This service will unlock the iPhone permanently and will only work internationally only. This does not remove iCloud.