Reliable internet/international business (Granada)

Hi Friends,

Me and my husband recently moved to Granada, and he works from home for a company in the U.S. We are in a temporary Air BnB until we find a more permanent home in Malaga.

Anyway, we are using the internet that came with the house and Vonage phones, but the speeds are often not fast enough to make calls. He is in a panic, if he can't be on conference calls, he might lose the contract all together. Does anyone have any suggestions?