Visit 1, Part 2 (Pre-Quit Assessment). Participants will complete self-report questionnaires on a laptop computer; and expired CO, weight, and height will be measured in a private room to ensure confidentiality. Participants will be provided with an Android smartphone and instructed regarding the use of the phone (participants may make personal calls) as well as the EMA procedures. Participants will receive 4 random prompts and 1 daily diary prompt (in the morning) during the normal waking hours each day for four consecutive weeks. Participants will be instructed to quit smoking at bedtime or 10:00 pm (whichever occurs first), on the evening prior to their next scheduled counseling session (one week later). Participants will be randomized to Standard Care (SC) or CM using a random numbers table and advised of their group assignment at the conclusion of visit 1. The appropriate schedule of payments (SC or CM) will be discussed with all participants (see Table 1). Visit 1 takes approximately 1 hour to complete, and participants will be scheduled to return for visit 2.