I purchased an iPhone 5c from Ebay. Called Sprint and talked to a guy who seemed very helpful. He talked to his "Back Office" after I gave him the MEID# from my phone. He confirmed it was eligible to be unlocked and that it would take about 5min. (He even confirmed the day the phone was activated and deactivated through Sprint) We made sure my phone was powered on and everything while they "worked on it in the background". I waited and then he said everything was good to go. About 3hours later I put my Tmobile sim card in, and got the same "unsupported sim card, contact carrier" message. Needless to say, I'd like Sprint to follow through on their part.
Howdy truthwarrior. I'll be more than happy to assist. Just FYI the unlock process takes at least 24-48 business hours to complete and send the unlock signal to the phone. I sent you a PM so I can gather the needed info.