Dual SIM : Not able to connect to internet from selected SIM

[AC Question]

Dear Team,

I have Samsung Galaxy phone and am using dual SIM in the phone.

The problem is i have activated internet pack on SIM 1 , once i enabled the mobile data for SIM 1 then in data usage its showing enabled for both SIM if i disabled the data for 1 SIM then automatically disconnected from both the SIM.

So not able to connect to internet from Only one SIM.

Please help me out.