Many telecom operators in India monitor SIM usage patterns and may begin marking a number as inactive if there has been no activity for around 90 days.
However, reaching 90 days of inactivity does not always mean the SIM is immediately deactivated. Instead, operators typically follow several steps.
Before this stage, inactivity generally refers to the absence of any chargeable or network activity on the SIM. Activity can include making or receiving calls, sending or receiving SMS messages, using mobile data, or using certain value-added services. Even minimal activity may reset the inactivity timer in many telecom systems.
1. Inactivity Flagging
After extended inactivity, the system may flag the number as dormant. The SIM may still work, but the operator may start monitoring it for possible deactivation.
In many cases, the process of inactivity begins after the validity of a prepaid recharge expires, and the SIM remains unused for a prolonged period.
2. Warning Messages
Some telecom operators send SMS notifications informing the user that the SIM has not been used and may be deactivated if activity does not resume.
These notifications are meant to alert users before the number moves closer to deactivation.
3. Grace Period
In many cases, a grace period may be provided. During this time, performing a recharge or making a call can reactivate the number.
Some telecom networks may first restrict outgoing services while still allowing incoming calls or messages for a limited time. If inactivity continues, incoming services may also stop before the SIM is eventually deactivated.
Automatic Balance Deduction Rule
In some cases, prepaid SIM cards may remain active even after 90 days of inactivity if there is a small balance in the account.
Telecom guidelines allow operators to automatically deduct a small amount, commonly around ₹20, from the main balance if the SIM has remained unused for about 90 days. This deduction can extend the validity of the number for an additional 30 days.
As long as the account continues to maintain at least this minimum balance, the operator may continue deducting the amount periodically to keep the SIM active.
If the balance falls below the required amount, the SIM may then proceed toward deactivation.
When SIM Cards Are Actually Deactivated
Actual SIM deactivation generally occurs after a longer period of inactivity, which may vary depending on the operator’s policy.
In several cases, deactivation may occur after 90 to 180 days of no chargeable activity, though this is not identical across all telecom providers.
For example, some operators such as Bharti Airtel, Reliance Jio, and Vodafone Idea may begin inactivity monitoring around the 90-day mark, while timelines for complete deactivation may vary. Certain operators, such as Bharat Sanchar Nigam Limited (BSNL), may allow longer inactivity periods in some cases.
For prepaid users, inactivity may also begin if the recharge validity expires or if the account balance remains unused for an extended period.
Some telecom operators may also provide a short reactivation window, often around 15 days, during which users can restore the SIM by recharging the number or contacting customer support.
Once deactivated:
• The SIM stops connecting to the network
• Calls and SMS no longer work
• The number may eventually be reassigned to another user
The exact timeframe depends on internal policies and regulatory guidelines.
What Happens to the Mobile Number
If the SIM remains inactive for a long time and is officially deactivated, the mobile number may enter a recycling process. This means the number can eventually be issued to a new customer.
The process for reclaiming or protecting a number is even more critical in specific legal situations; for instance, understanding what happens to a SIM card after death in India can help families avoid losing access to vital banking and WhatsApp data.”
Before reassignment, telecom operators typically maintain a waiting period or holding phase to reduce the chances of confusion or misuse of services tied to the previous owner. However, once the number is reassigned, the original user usually cannot recover it.
Impact on Services Linked to the Number
Many digital services rely on a mobile number for verification and security.
If a SIM becomes inactive or the number is reassigned, it may affect access to:
• Banking alerts and OTP verification
• UPI accounts
• Messaging apps
• Email account recovery
• Social media logins
• Government service portals
If someone else receives the recycled number later, they may receive calls or messages intended for the previous user until accounts are updated. For this reason, it is important to keep critical services linked to an active number.
Prepaid vs Postpaid SIM Cards
The inactivity issue mostly affects prepaid SIM cards. Prepaid numbers depend on periodic recharges or usage to remain active. If recharge validity expires and no further activity occurs, the number may eventually be marked as inactive.
Postpaid numbers generally remain active as long as the billing account remains valid and bills are paid. However, prolonged non-usage combined with unpaid bills can still lead to account closure.
How to Keep a SIM Active
Avoiding SIM deactivation is usually simple. Basic activity can keep the number active in most cases.
Examples include:
• Making a short outgoing call
• Receiving or making a call
• Sending or receiving an SMS
• Using a small amount of mobile data
• Recharging with a minimal plan or balance
Even occasional activity can reset inactivity timers in many telecom systems.
What to Do If Your SIM Stops Working
If your SIM suddenly shows “No Service” or cannot connect to the network, it may have been deactivated. While ‘No Service’ often means inactivity, it can also be a warning sign of SIM swap fraud, a common tactic used by scammers to intercept your OTPs.”
However, network problems, SIM card damage, or incorrect phone settings can sometimes cause similar symptoms.
Possible steps include:
• Restart the phone
• Reinsert the SIM card
• Check network settings
• Contact the telecom operator’s customer support
• Visit a telecom store with identification documents
You may also contact providers such as Bharti Airtel, Reliance Jio, Vodafone Idea, or Bharat Sanchar Nigam Limited for assistance.
In some cases, operators may reactivate the SIM if the number has not yet been reassigned. However, if the number has already been recycled, recovery may not be possible.
The Bottom Line
If a SIM card is not used for around 90 days, telecom operators may mark it as inactive and begin the process that can eventually lead to deactivation.
The exact timeline varies by operator, but prolonged inactivity can result in loss of the number and disruption of services linked to it.
To avoid this situation, users should perform occasional chargeable activities such as making a call, sending a message, or recharging the number.
Keeping a SIM active ensures that important services linked to the mobile number continue to function without interruption.
Frequently Asked Questions (FAQs)
1. Is a SIM automatically deactivated after 90 days of inactivity?
Not always. In many cases, telecom operators begin monitoring a SIM for inactivity after around 90 days, but the number is not always immediately deactivated. The exact timeline varies by operator and may extend to 120–180 days before full deactivation if no chargeable activity occurs.
2. What counts as activity that keeps a SIM active?
Any basic network usage can usually reset the inactivity timer. Examples include making or receiving a call, sending or receiving an SMS, using mobile data, or performing a recharge. Even minimal activity is often enough to keep the SIM active.
3. Can a SIM remain active without recharge?
In some cases, yes. If there is still balance in the prepaid account, certain telecom operators may deduct a small maintenance amount (often around ₹20) after about 90 days of inactivity to extend the validity for an additional period. However, if the balance becomes insufficient, the SIM may move toward deactivation.
4. What happens if my SIM is deactivated?
Once a SIM is fully deactivated, it will stop connecting to the mobile network. Calls, SMS, and mobile data will no longer work. After a waiting period, the mobile number may enter a recycling process and can eventually be issued to a new user.
5. Can a deactivated SIM be reactivated?
Sometimes. If the number has not yet been reassigned to another customer, the telecom operator may allow reactivation within a limited period. Users may need to contact customer support or visit a telecom store with valid identification to request reactivation.