Homes and businesses in the Village of Crai in Bannau Brycheiniog national park were struggling with broadband speeds of less than 1.5 Mbps.
Roedd cartrefi a busnesau ym mhentref Crai ym mharc cenedlaethol Bannau Brycheiniog yn ei chael yn anodd gyda cyflymder band eang llai na 1.5 Mbps.