My phone is blocking all sim cards

lewis543979lewis543979 Posts: 1FreedomPop Newbie
o a while ago I put a freedom-pop card into my phone to see if it works, but it didn't and when I tried to put my EE one back in and it locked it asking for a code or something so we rang up ee and they gave us multiple codes and none worked so I am really confused why it isn't working. Please help#

My phone is a Samsung galaxy j3, and when i called up EE they said the other sim card provider(Freedom-pop) had to give me a unlock code

When i try to Enter a sim it says something about entering a network puk Coke
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