"Device restricted", need to "clear restrictions" with a password
I recently swapped phones, my new one being a pre-used model of a Samsung Galaxy S8 that I bought from the Boost Mobile website. Calling and texting work fine but every time I attempt to connect to the internet, the phone shows a "device restricted" screen, and I cannot connect. The "Device restricted" screen also says something about how Sprint still owns the phone, with an option to "clear restrictions" with a password. I went to Sprint to see if they could help, but they claimed Boost would be able to give me a password. I would like some help with this, because as far as I know only me and Boost have had this phone, not a third party, and I do not owe any outstanding balances on this phone.