<p><span style=”font-weight: 400;”>Many mobile users keep a secondary SIM only for OTPs, banking, or backup use. The main goal is simple: keep the number active at the lowest possible cost. Telecom companies offer different long-validity prepaid plans for this purpose. Some focus on calling benefits, while others provide data packs.&nbsp;</span></p>
<p><span style=”font-weight: 400;”>If you are only looking for the cheapest recharge plan to keep your SIM alive, here is a simple and factual comparison of available options from major telecom operators in India.</span></p>
<h2><span style=”color: #ba372a;”><strong>BSNL Cheapest Recharge Plan To Keep SIM Active</strong></span></h2>
<p><span style=”font-weight: 400;”>BSNL offers a Rs 449 prepaid plan with 90 days of validity. The plan includes unlimited voice calling across India, free national roaming, 100 SMS per day, and 5GB total data without a daily cap. The effective cost is around Rs 5 per day.&nbsp;</span></p>
<p><span style=”font-weight: 400;”>This plan is suitable for users who want long validity with calling benefits at a lower daily expense. BSNL has also been expanding its 4G infrastructure in many circles.</span></p>
<h2><span style=”color: #ba372a;”><strong>Airtel Lowest Validity Recharge Plan For SIM Active</strong></span></h2>
<p><span style=”font-weight: 400;”>Airtel&rsquo;s Rs 548 prepaid plan comes with 84 days of validity. Users get unlimited local, STD, and roaming calls, 7GB total data, and 900 SMS for the entire validity period.&nbsp;</span></p>
<p><span style=”font-weight: 400;”>The plan also includes a 12-month Adobe Express Premium subscription and Airtel&rsquo;s spam alert feature. The daily cost is higher compared to some other operators, but it includes extra digital benefits.</span></p>
<h2><span style=”color: #ba372a;”><strong>Jio Cheapest Long-Validity Recharge Plan</strong></span></h2>
<p><span style=”font-weight: 400;”>Jio offers a Rs 195 data pack with 90 days of validity. This pack provides 15GB total high-speed data for the full period. However, it does not include voice calling benefits.&nbsp;</span></p>
<p><span style=”font-weight: 400;”>Users who need only data for devices like Wi-Fi dongles or secondary phones may consider this plan. For calling-based usage, a regular prepaid plan would be required.</span></p>
<h2><span style=”color: #ba372a;”><strong>Cheapest Recharge Plan To Keep SIM Alive In India</strong></span></h2>
<p><span style=”font-weight: 400;”>If the goal is only long validity with calling support at the lowest daily cost, the Rs 449 BSNL plan currently offers the lowest per-day expense among the options listed. However, if additional features like OTT or digital subscriptions matter, Airtel&rsquo;s Rs 548 plan provides added services.&nbsp;</span></p>
<p><span style=”font-weight: 400;”>For data-only needs, Jio&rsquo;s Rs 195 pack is the most affordable option. The best choice depends purely on usage requirements and not brand preference.</span></p>

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