Hi, I bought Vivo v9 recently, but the internet connection on SIM 2 doesn't work and is not a SIM Card problem. When I change the SIM Card that was in slot 2 for the slot 1 it works perfectly and the SIM Card that was in slot 1 before doesn't work anymore. The problem is in slot 2.

Any setting need to be changed? What can I do to solve it? Please help. Thank you.