How to work with operators through Content Provider Access (CPA)?

Question

Telephony

Dear men!

Can you please tell me how to start working with operators through Content Provider Access (CPA)? Are there aggregators that unite large operators? Or is it necessary to call up and conclude agreements with each of the operators separately?

I am interested in mobile operators who work in the territory:


I would be very grateful if you can send me links to aggregators.

PS For a good complete answer, I will smile, put a like! And the most - the most useful answer will choose his solution!

Answer 1

CPA and all those paid subscriptions are evil. Universal, black. If you take the side of evil, then no one will help you, only curse.