Samsung E1210M NCK code

Hi. I bought a second hand samsung e1210m as secondary phone. But the person from whom I bought the phone didn’t told me that the phone is locked to one of our providers. May I request help about unlocking?
IMEI 353014/03/029758/8
S/N RPCS925219T
To the moderator team – because I can’t report(not enough postings) I made a request about relocation of the other topic. Please delete the other topic, because it is in the wrong section. Thank you.