The cornerstones of business communication:

• Your business name/brand
• Your web address and social media presence
• Your phone number

When starting out it is very tempting to work off your mobile phone. Then the limitations start to become clear:

• You have to switch it off in meetings
• You lose network coverage (usually in the middle of a call)
• A business with no landline number is very obviously a one-man-band and this isn’t the image you want to portray