Unlocking

SO I WENT TO CELLUNLOCKER DOT NET AND WENT THROUGH A BRUTAL 2 WEEKS WAITING FOR MY CODE TO GET EMAILED TO ME. FROM VARIOUS DIFFERENT INSTRUCTIONS OR STEPS RANDOMALLY PRODUCED BY MYSELF HAS CAUSED MANY PROBLEMS WHEN DEALING WITH PHONES, PLEASE TAKE NOTE. ANYWAY BACK TO MY ISSUE. IN OTHER WORDS...

I have an iPhone 5c that I had bought off my friend and I want to have my service continued through another service (Walmart family mobile) but I tried reading through the long complicated text provided by sprint but I didn't understand what they had to say.

I currently have a galaxy s6 with verizon and I was on the edge plan where you pay for your phone as you go withrough your bill. So my phone has been disconnected and I was wondering if I could put a verizon prepaid sim card in this phone or is it locked because it hasn't been completely paid for..