Hey Junior! Can you send us a DM with the following info on that Galaxy J3?
Phone # it was last active on
Account PIN or Security Password for that account
Account holder's first and last name.
best contact email
You'll also want to follow the steps in the main article in the thread(phone has Sprint SIM inserted, connected to WiFi or in an area with good Sprint coverage)
feel free to send us a private message once you get that info, Junior. We're not able to do anything until we get it.