first enter *#782872# then "CONFIRM"
then follow sequence sequence below
*#197328640#
8 Common
5 Usb Configuration
2 USB ACM -CP
USB ACM - CP COnfigured
press end call and turn main menu
again *#197328640#
8 Common
6 UART Configuration
1 DIAG
Diag SRVC Configured
press end call...
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