Greetings! I have a Samsung S3 Clone from China. I cannot access my sim now after using *#*#4636#*#* and changing the Preferred Network to China's 3g - TD-SCDMA. How do I root this or flash this? This is what can be found in the "About Phone" Model Number GT_I9300 Android Version 4.1.9 Baseband Version I9300DDK1 Kernel Version 2.635.7-I9300XXXKL3-CL793489root@DELL136#2 Build number GINGERBREAD.XXKL3 Thanks!