Thank you very much for this tutorial.
I fellow this for repair C6802.
But it give error in bellow.
Welcome to S1 tool. That is small and crippled subset of SETOOL2 service tool. SELECT FIRMWARE PACKAGES YOU CAN SELECT SEVERAL PACKAGES WITH CTRL BUTTON CHECKING PACKAGES ... DETACH USB CABLE FROM PHONE REMOVE BATTERY FROM PHONE ATTACH TESTPOINT PRESS "READY", THEN ATTACH USB CABLE TO PHONE will use Sahara protocol ... REMOVE TESTPOINT NOW, THEN PRESS "READY" PROCESSING ... SERIAL NUMBER : 84A53600 HARDWARE ID : 04000100E1007B00 HASH :49109A8016C239CD8F76540FE4D5138C87B2297E49C6B30EC31852330BDDB177 Emergency loader uploaded ... RUNNING S1_PRELOADER VER "LOADER_RELEASE_MSM8974_23_4_AID_4" LOADER AID: 0004 can't get S1 command header LOADER NOT RESPONDING Elapsed:94 secs.