1. Profitable Growth B3X Number one to the customer! KF600 Software upgrade Guide Step 1: Open GSMULTI V2.1 & select the Dll file & software file as shown. Baud rate 460800  In case technical Cable connected through USB to serial converter Baud rate 115200  In case technical cable connected to PC com port Note : Software file is combined fls file, only one file with.fls extension

2. Profitable Growth B3X Number one to the customer! KF600 Software upgrade Guide Step 2: Connect the phone with battery in OFF condition, when “Wait phone connecting is displayed”

3. Profitable Growth B3X Number one to the customer! KF600 Software upgrade Guide Step 3: Software upgrade will start as follows……. Upgrade started……… In progress……………….. In progress………………….

4. Profitable Growth B3X Number one to the customer! KF600 Software upgrade Guide Step 4: Disconnect the phone when “Pass” is displayed. Select AI Select 1.8v Part Code: BSEA0004160 Technical cable details Note : Recommended to connect Technical cable through USB to serial converter Time taken for upgrade using USB to serial converter cable  50 Mins Time taken for upgrade by directly connecting to PC com port  More than 3 Hrs