Swiss multinational company Credit Suisse, in the latest report, has revealed that Reliance Jio is ahead of its rivals, Airtel, Vodafone and Idea, in network coverage, but its 4G speeds are slow compared to Airtel. The reports added that Airtel 4G offered over 12Mbps speed, while Jio, Vodafone and Idea gave 7-8Mbps.