I had two unavailable number calls today from an Indian call centre wanting me to give them all my details so that they can scam me. The first one I managed to keep going for 2 minutes 12 seconds with my made up nonsense and the second one lasted 2 seconds when I answered as a made up police Station. Apparently these calls are from abroad and dont use TPS etc so are unstoppable. Any one had experience of or can offer any advise.