and probably i would have died as a drunk, and nobody would have ever realized who peter samuel was. but god picked me up from that situation and put me here. >> reporter: such testimonies dramatized through the "power to change" campaign gave local churches a powerful, new way for christians to reach their city. the director says media compaigns can saturate unreached populations. >> we're not bringing people into a stadium. we're, together with the churches, going and targeting the whole city. 10million people in the city, and 10 million people are the targets. >> reporter: thousands of callers flooded the phone centre, requesting the book of the stories of lives changed by god. >> we had 60 phones going pretty well non-stop. we should have over 100,000 telephone calls of people who specifically ordered that book i just described. we're talking about hindus, we're talking about muslims in the city of hydrobad. it is something that churches have never ever seen in that city. >> reporter: participating church leaders already report new visitors, and they've also seen their own congre