You can find a list of Mobile phone companies in Sri Lanka which you might find interesting. These are the links to all the mobile phone companies with their APN settings as well as their USSD codes and MMS settings. You can see the links listed below with the latest information. You can search this website for more information in this regards or call their service or call centre for more information as well as assistance.
Sri Lanka Mobile Phone Companies
https://www.manual-owner.com/mobitel-srilanka-ussd-codes.html
