A Spanish doctor created a method to use one addiction to cure the other; a service called SMS 5870.
Here's how it works. During seven days every time you crave a cigarette send a blank SMS to 5870. The system will answer with information on the health benefits of not smoking. Assuming that you quit smoking after this period, the service continuously sends advice on how to fight anxiety and the cold-turkey in the morning, after meals and at night. Passed these seven days the system only sends messages when the person requests. Detail: the service is not free, besides the SMS messages (0.15€ each) the registration costs 90€.