# GCF I Homepage > The Global Certification Forum (GCF) is an independent certification scheme for mobile phones and wireless devices that are based on 3GPP standards. Location: Global ## Categories - Mobile phones - Electronics ## Documents - [Business profile](https://directory.websdocs.com/business/gcf-i-homepage) - [Directory JSON](https://directory.websdocs.com/business/gcf-i-homepage.json) - [Schema.org JSON-LD](https://directory.websdocs.com/business/gcf-i-homepage/schema.jsonld) - [Directory sitemap](https://directory.websdocs.com/sitemap.xml) - [Directory discovery manifest](https://directory.websdocs.com/.well-known/asg-directory.json) - [Directory OpenAPI](https://directory.websdocs.com/api/openapi.json) - [Official website](https://www.globalcertificationforum.org/)