How to Unlock my iphone5 Sprint? I want to use China Unicom USIM card

Question

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Need your Help!

Answer 1

Don't post information such as this on a public user forum.  This is a public user to user forum for technical questions so nobody here will be able to help you and you are NOT addressing Apple here.  If you want help, then you'll need to contact Sprint.  They are the only ones that can help you.
However, Sprint is what is known as a cdma carrier and if their phones are like Verizon, then it is not locked.  From the iPhone 4s version it was required that any cdma phone with a sim card portion for gsm use should be unlocked out of the box and this is the same for Verizon, which is the other cdma carrier.  The sim card tray should be unlocked already, so get a key and open the sim card tray and insert and local sim card in the phone and it should detect a network in China and you can use the phone.
Other than this, if the phone is not unlocked, then you are out of luck and you won't be able to use it.  You would need to contact Sprint directly to get the sim portion of the phone unlocked for use with the gsm network in China.
If you can't do this, then your only other alternative is to purchase a phone in China that you can use and will work with the Chinese networks.
Think before you buy next time and check that the phone is compatible and will work where you want to use it.
Other than this, then contact Sprint directly to see if they will unock it if it is in fact locked or buy a new phone.