The ad I read about this app said "any old phone just laying around in a drawer will work." What it didn't say was that old dust collector in the drawer has to have service, ie you have to be able to connect to the internet. I don't know about anyone else, but the phones in my drawer are all emptied of the sim card I'm using now. What a waste of time. Also very misleading advertising. There should be a law against false advertising. Hey, wait a minute!