– Extra rom file and run Msm8x39DownloadTool.exe (Install .NET Framework 4.0 if there are errors)
– Select Model number, it’s the file name gpt_main0_partition_msm_xxxxx.xml.bin (in the rom folder, xxxxx is Phone model number). OK
– Click Verify and wait for the check to complete.
– When the tool OK is OK.
– Tick as image below and click Start
– Power off device, press + hold Volume Up buttom and connect to computer. When tool show green line, you release Volume Up buttom.
– Waiting the tool show green USB is ok
– Disconnect to computer and click Exit.