No Internet using dual sim as mobile hotspot
Solution 2:

Please Run "ipconfig" command in your Command Prompt. After running command you can find information's like "IPv4 Address", "Default Gateway", Subnet Mask, etc.
Use those values in respective fields of :

Open Network and Sharing Center-->Change Adapter Settings-->Right click on "Wireless Network Connection"-->Properties-->Select "Internet Protocol Version 4(TCP/IPv4)"-->Select Radio Button for 1)Use the following IP Address, 2)Use the following DNS Server automatically --> and finally "Ok"

Field to be filled:
1)IP Address
2)Subnet Mask
3)Default Gateway
4)Preferred DNS Server

NB:"Default Gateway" need to given as "Preferred DNS Server"

Best Regards