Why won't my unlocked UK Galaxy S4 connect to a USA Network?

CurlyFourEyes

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Oct 4, 2014
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Unlocked UK Galaxy S4 Won't Connect to USA Network

I have a Samsung Galaxy S4 that was on the O2 network in the UK. I moved back to the USA and wanted to use my phone on my Sprint Network. I got an unlock code from doctorSIM, and the code worked, but my S4 won't connect to the network. I even did a factory reset, but it still won't work.

Instead I got these two errors:

2014-10-02 15.20.26.jpg

"The network did not respond in time. The SIM card was locked. Please power cycle the device and if the problem persists, contact Customer Service."

and

2014-10-02 15.23.02.jpg
"The mobile network will be unavailable until you restart with a valid SIM card inserted."

Any advice would be appreciated.
 

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