For a business to start. You should be able to set up a Home Office and use the phone for your convenience, privacy, because no one can talk to you the customer.
For starting a business, you should set up a home office and a Windows Phone as a convenience to you, because no one can talk about a client, except you.
For starting a business. you should establish the home office and make personal phone calls to your convenience because ไม่มีใครสามารถ conversation with customers but you.