Annanager is high scrapper area, where the EVDO signal stopped by High rised buildings except in top floor in open area.. nearest open area is koyambedu BTS so how many k.m you are residing..If you actually want connection quickly you can contact Customer Relation Manager(CRM) Shri.Narasimhan, at BSNL Office 40,CIPET Road, Tiru ViKa Industrial Estate.. Just take a MTC bus from Annanager to Tambaram route and alight near guindy estate stop just a couple of walking distance.. I know a customer who come from Avadi to meet him(instead of going to local office) and provided the EVDO connection within 20 minutes.. Even appreciated this to GM who in turn circulated the news to motivated other staff...