虽然是英文版，不过挺好用的，基本功能都正常android
1.线刷romide
http://61.160.234.148:8002/2015-05-13/[10004691]三星%20SGH-I747M%204.4.2%20KOT49H.I747MVLUFOB1_加拿大(BMC)_官方原版_20150513203653.zipip
2.线刷recovery，为卡刷作准备it
http://downloadandroidrom.com/file/GalaxyS3/recovery/CWMTAR/CWMS3ATTrecovery.tarclass
3.卡刷superSU，见附件file