HTC EVO 4G LTE

I'm in the midst of looking for a Sprint HTC Evo 4G LTE to use with Ting. Ting's whitelist* indicates the two following models are compatible:

-EVO 4G LTE Black (APX325CKT),
-EVO 4G LTE White (APX325CWH)

But... nearly every pre-owned Sprint HTC Evo 4G LTE I've found (so far) identifies the phone as model #PJ75100.

Is it possible that Sprint's version of the Evo 4G LTE has two model numbers? Or maybe the APX325 whitelist numbers listed are a different type of identifier?

Appreciate any advice or referral to help me clarify this matter before i plunk down cash on an actual phone.

thanks,
~dawn



*https://help.ting.com/entries/22567167-BYOD- Supported-Devices-Whitelist-