[Q] Unknown - Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot

My Samsung s4 us Cellular IMEI Number and Baseband Unknown
what can i do???
:crying:

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I have a Galaxy S4 SPH- l720T model and need to unlock it .
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Model SPH- L720t > Triband<
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Android Version: 5.0.1
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Sorry my Google Translate english.

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