What Is GP1 and GP2 in BSNL? Grace Period Explained

Quick answer: GP1 and GP2 are BSNL’s two grace periods for prepaid customers whose plan validity has expired. GP1 lasts 7 days, during which you can still receive calls but not make them. GP2 starts on day 8 and lasts 165 days, during which every service, including incoming, outgoing, SMS, and data, is switched off. If you don’t recharge before GP2 ends (172 days after expiry, total), BSNL disconnects the number permanently, and it can be reassigned to someone else.

If you’ve checked your BSNL balance recently, you’ve probably seen an SMS with terms like Balance Amount, Plan Validity, State, GP1, and GP2, and wondered what half of it means.

This guide breaks down every one of those terms, tells you exactly what works and what doesn’t during each grace period, and answers the questions BSNL users actually ask when their number is heading toward disconnection.

What Does GP Mean in BSNL?

GP stands for Grace Period. It’s the buffer window BSNL gives prepaid customers after their plan’s validity ends, before the number is disconnected for good.

Instead of cutting you off the moment your plan expires, BSNL splits this buffer into two stages, GP1 and GP2, each with different rules about what still works.

This two-stage system isn’t unique to BSNL. Most Indian telecom operators run something similar under TRAI’s guidelines. But BSNL’s version is one of the more generous ones, especially in GP2, where the window runs far longer than most private operators offer.

GP1: Grace Period 1

GP1 begins the day after your plan’s validity expires and lasts 7 days.

What works during GP1:

• Incoming calls
• Emergency and toll-free numbers

What stops during GP1:

• Outgoing calls
• Outgoing SMS
• Mobile data

If you recharge with any valid plan voucher before GP1 ends, any unused balance from your previous plan carries forward to the new one. Miss this 7-day window, and two things happen: any leftover balance is forfeited, and your number moves into GP2.

GP2: Grace Period 2

GP2 begins on the 8th day after your plan expires (right after GP1 ends) and lasts 165 days.

What works during GP2:

• Nothing. All services such as incoming calls, outgoing calls, SMS, and data are switched off.

Your SIM technically still belongs to you during this window, but it behaves like a dead number to anyone trying to reach you. The only way out of GP2 is to recharge with any available plan voucher before the 165 days run out.

Add GP1’s 7 days to GP2’s 165 days, and you get 172 days total ( just under six months), as the full grace window BSNL gives you from the day your plan expires to the day your number is permanently disconnected.

GP1 vs GP2: Quick Comparison

Other Terms in Your BSNL Balance SMS

Your balance-check SMS usually bundles a few more terms alongside GP1 and GP2. Here’s what each one means.

Balance: The amount in your prepaid account for calls and SMS. If your top-up is denomination-based, it shows up directly in this balance; if you’re on a time-based tariff plan, the plan’s benefits apply separately and may not appear as a rupee figure in your main balance.

Plan Validity: The number of days your current plan stays active from its activation date. You can call, text, and use data under the plan’s terms until this date, after which GP1 begins.

State: The current status of your SIM, essentially whether it’s active, in GP1, in GP2, or disconnected.

How to Check Your Grace Period Status

You don’t have to guess which grace period you’re in. Dial *123# from your BSNL prepaid number to see your plan details, including validity, GP status, and plan name.

For a more specific grace-period check, dial *123*1#. You can also check your status through the BSNL Selfcare app, provided you’re still logged in. Note that once GP1 ends, you may stop receiving login OTPs via SMS since incoming SMS is also blocked in GP2.

Related: BSNL USSD Codes and SMS Formats for Balance Check & Validity

How to Recharge During GP1 or GP2

This is the part most people get wrong, largely because the several online guides didn’t spell it out clearly: you can recharge normally during both GP1 and GP2.

There’s no special “grace period recharge” process. Any valid plan voucher available for your circle will reactivate your number.

A few practical notes based on what BSNL users actually ask:

• You don’t need a specific plan to exit GP1 or GP2. Any recharge that activates a valid plan will do it. You’re not restricted to a particular voucher.
• There’s no dedicated “incoming-only” plan to keep a number reachable without full recharge. If you just want the number to keep working at minimum cost, look for BSNL’s lowest-value validity-only vouchers (some circles offer these from as low as ₹29–₹107), rather than assuming a special incoming plan exists.
• Recharge before GP1 ends if you want to keep any leftover balance. Waiting until GP2 means that balance is already gone, even though the number itself is still recoverable.
• Plan availability and pricing vary slightly by telecom circle, so the exact minimum recharge amount to reactivate your number can differ depending on where your SIM is registered.

What Happens After GP2 Ends

If you don’t recharge within the full 172-day window (GP1 + GP2), BSNL permanently disconnects the number. Once that happens:

• The number is released back into BSNL’s pool and can be reassigned to a new customer after a cooling-off period.
• You lose access to anything tied to that number ( banking OTPs, UPI accounts, social media logins, and so on ), which is usually the more painful consequence than losing the number itself.
• There’s no guaranteed way to recover a number once it’s been reassigned to someone else.

If you rely on a BSNL number for anything important, treat GP1 ( not GP2) as your real deadline. Waiting until GP2 still gives you months of buffer, but it also means running with zero connectivity on that number the entire time.

Related: BSNL Duplicate SIM Card: Complete SIM Replacement Guide

Common Mistakes to Avoid

• Assuming GP2 means the number is already lost. It isn’t. Recharging any time during the 165-day GP2 window reactivates it. Disconnection only happens after GP2 fully expires.
• Waiting for a “special” GP2 recharge plan. No such thing exists; any regular plan voucher works.
• Ignoring the SMS block during GP2. If your number is linked to OTP-based logins (banking, UPI, email recovery), losing SMS access during GP2 can lock you out of accounts well before the number itself is disconnected. It is worth updating your OTP receiving mobile number elsewhere if you know a recharge is coming up.
• Letting a secondary or backup SIM drift into GP2 unnoticed. Numbers you don’t use daily are the most common ones to accidentally lose. Set a reminder around your plan’s expiry date.

Myth vs Fact

Related: BSNL Kerala Prepaid Plans 2026: Latest Recharge & Data Pack Prices

Frequently Asked Questions

We hope this cleared up exactly what GP1 and GP2 mean for your BSNL number. If your number is currently sitting in either grace period, the simplest fix is the one outlined above. Recharge with any valid plan before the window closes, and everything reactivates automatically.

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