I have a Samsung Galaxy S3 model SCH-i535 Verizon with 4.1.2. I was able to make calls and use messageing. I rooted it and unlocked it with bootstrap CWM trying to get the data to work. I still can't get data (internet) to work with T-Mobile sim which has 5gb of data to use. I tried to do some rom changes but now I have lost all APN information. Not even the Verizon APN is showing. I can't add any APN information. I get the message that it isn't allowed. I reset it to factory without success. It will no longer let me make calls or message nor access data. I am looking to downgrade to 4.1.1 in hopes of getting the sim to work for T-Mobile.
Does anyone have a download link for 4.1.1 for the SCH-i535 Galaxy S3??
Not really familiar with it, but once you get it back to stock, with the latest update, you would just need to edit the apn. You would only get 2g on tmobile
dpham00, Android Central Moderator
Sent from my Verizon Samsung Galaxy Note 3
I got it to make calls and mms again.... but still can't get data (internet) ti work. I am alsi havibg troubke getring it rooted again after I reset to factory.