Can I put a Tesco mobile sim in a phone locked to O2?

[likemother]

Can I put a Tesco mobile sim in a phone locked to O2?

[jonsie · Accepted solution]

Yes the Tesco sim will work in the O2 phone

[Bambino]

@likemother O2 hasn't sold locked phones since 2018. Are you sure the phone is locked? If it is and you want to unlock it, see this guide: Unlocking an O2 phone to use a different SIM card. - o2uk