None. People scare each other about the hazards of mobile phone and snatch the contracts from others. When I was the treasurer of our building we negotiated with Hutchison(now Vodafone) and it was agreed that they will pay us Rs2.5 Lakhs every year. However two members were scared by people from neighbouring building regarding the hazards of mobile tower. We cancelled the contract and the neighbouring building got a mobile tower erected on their terrace.