Work from the Computer?

i am currently looking to make sales calls to the united states from here in asia. do any of you do social media marketing from outside the united states? my question is how do you make calls from here in asia to the united states? do any of you recommend a VOIP phone calling software if so what should i use? the biggest thing i need to know is how can i make calls from here in asia to the united states.. preferably unlimited calls.

Hopefully someone can help me with this. I have had a request of documents for my DTV.

1) a bank statement with the 500k baht ( which i sent in my original documents)

But will send again

2) business license ( which I also sent my 2024 and 2025 in my original documents) but will send again

Not sure why I have to send them when I sent them already but whatever

3) upload proof or remote work

- this is the one I need the help with, I already sent a cover letter explaining what I do ( I’m a residential Cleaning company owner) I have employees and I have a manager that runs my business, anything I do for my business I do remotely such as social media marketing, payroll, speaking with clients ( when needed and my manager can’t) scheduling etc. I put this all in my cover letter to them along with links to all my social media pages etc , what can I send them as proof of remote work with my name on it like they are requesting

Please help