Central has just 1 single 5G tower (capacity: 316 users) serving 990 subscribers on 5G Premium devices. Those 5G Premium subscribers churn at 25.45% — 2.6+ percentage points worse than any other region. The 5G promise is undeliverable. Central's entire tower base (14 towers) still includes 21% 3G infrastructure, the highest proportion in the network.
Central has lost more subscribers to churn than it gained via activations every year since 2021: −12, −17, −22, −20, −40. The decline is accelerating. With only ~4,000 total subscribers (5% of the network) concentrated in a single circle (Madhya Pradesh), this is a structural vulnerability that won't self-correct.
South — previously the most resilient region — suddenly lost 89 net subscribers to competitor port-outs in 2025 (vs +10 in 2024). This is NOT a broad trend: Telangana Tier 2 swung from +20 to −48, and Karnataka Tier 1 from −1 to −29. These two circles alone account for 87% of the damage. Targeted competitive response needed.
East's average ARPU grew from 986 to 1,034 over 7 years (+48 INR, 4.9% cumulative). West started higher (1,014) but grew only 6 INR (0.6%). East's ARPU growth rate is ~8x West's, despite similar segment mixes and network quality.
Call drop rates (0.0148–0.0154), throughput (27–42 Mbps), and signal strength (~−88 dBm) are nearly identical across all 60 circles. Yet "network quality" is the #2 churn reason everywhere. The perception of poor network may be driven by 5G expectations rather than actual 4G degradation.
At 24.24% churn, West Bengal Tier 1 breaks the pattern where Tier 3 Rural circles dominate the worst churn list. This is a metro urban circle performing like a rural one. Warrants targeted investigation.
Corporate account retention — Corporate segment has 4.7–6.4% churn (lowest) — what's driving the variation? Are specific corporate accounts at risk?
Cohort analysis by activation year — Do 2019 cohorts behave differently from 2023 cohorts within the same region?
Seasonal patterns — Monthly churn timing could reveal competitive campaign effects
Channel effectiveness by region — Do App vs Store vs IVR drive different outcomes in different regions?
Add-on purchase as retention signal — Do subscribers who buy add-ons churn less? Does this vary by region?