No data or mms on Sprint Galaxy S3 flashed to verizon

[Jonkimble]

A couple months ago, I cloned my Verizon LG octane with my sprint s3. So far it has been good, as far as voice and text goes, but I still haven't been able to get mms or data to work(3g). I think that it is a problem with the apn settings, but I'm not very sure. I have tried a number of solutions but still cannot get the Verizon apn to save after editing the Mnc. The Mcc is at 310, which is what I need, but the Mnc is at 120, instead of 012. Everyone I change the mnc the whole apn disappears. Is this the reason data and mms doesn't work? If it is is there a definite solution?
Thanks in advance

 

[Rukbat]

Since the phone is claiming to be on the Sprint network (the 120 MNC) it's not going to work on Verizon.

Add a new APN. Set it up properly. Delete the old APN. If that doesn't work, I think you're out of luck.