Cheapest Minimum Recharge Packs to Keep Your Secondary SIM Active for 365 Days

Published: November 2026 1610 Words 8 Min Read Verified by RechargeKar Desk

Need to keep a bank-linked secondary mobile number active without paying ₹300 every month? Review minimum recharge options across BSNL, Vi, and Airtel.

BSNL's Annual Secondary SIM Value

BSNL provides long-validity voice vouchers starting at ₹797 for 300 days of validity, making it the most cost-effective secondary SIM choice for receiving bank OTPs.

RechargeKar Senior Research Team

Our editorial team conducts primary research, benchmarks statutory guidelines, and cross-references regulatory mandates to deliver verified, transparent consumer guidance.