In this online, randomized controlled trial (RCT), the participants will be randomized and allocated in 1:1 ratio to mobile phone-based intervention group or to the wait-list control group. Participants will receive a 12-week intervention with follow-up at week 26. The primary outcome includes biologically verified continuous smoking abstinence at week 26 after the quit date. The main secondary outcomes include seven-day point prevalence smoking abstinence at weeks 1, 2, 3, 4, 8, 12, 16, 20 and 26, self-reported continuous smoking abstinence at weeks 4, 8, 12, 16, 20 and 26 after the quit date. About 2000 smokers with willingness to make a quit attempt within a month from October 2022 to April 2023 or until the recruitment process is complete will be recruited. The final 26-week follow-up will be completed in November 2023. The trial results will be available by the end of 2023 .
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Continuous smoking abstinence
Timeframe: at week 26 after the quit date