Reading prepaid churn signals before a SIM goes quiet

Prepaid churn rarely announces itself with a formal cancellation. More often, a SIM that once recharged weekly stretches to twelve days, then twenty, while data sessions shorten after dinner. For teams watching the Mekong Delta corridor between Can Tho and An Giang, those quiet stretches matter more than the final inactive flag.

Start with a clear definition of silence. Agree whether three missed expected recharges count as a risk signal, or whether you wait until data volume falls below a personal baseline. Different desks use different clocks; the assessment only holds if everyone shares the same one.

Visualize tenure bands next to handset age. Older feature phones often show a gentler fade, while certain smartphone cohorts drop after a single failed topping-up window. Annotate known local events—harvest pay weeks, student returns—so a seasonal dip is not mistaken for lasting exit.

Hand the charts to field managers with a short narrative: which three cohorts to call first, which to leave alone until after Tet. The goal is a ranked conversation list, not a wall of undifferentiated red cells.