there are some online companies that's giving this service.
are you able to make such an application to send messages to 10.000 numbers a day through whatsupp platform.
there might be some prerequisites just like so many sim cards from my country. i can provide this.
10 freelancer menawar dengan rata-rata $672 untuk pekerjaan ini
Hello, I have worked on something similar to this before and I would be glad to work on this project for you. You can check my profile portfolio for more details