Samsung S3 not recognizing SIM

[croyde]

Sold my Samsung S3 locked to Orange, on eBay and I have just got an email from the buyer who says he has tried 2 Orange SIMs in the phone yet they are not recognized.

It was working fine until Orange switched off my old SIM and powered up the new one in my S5.

Would Orange have done anything to stop the phone being used. I have never had a problem selling on an old phone before.

Any ideas, Cheers.

[croyde]

Well he gave me positive feedback but said that the phone did not work with the sims that he had.