by Call forwarding—also known as call divert—is a mobile network feature that allows incoming calls on your number to be redirected to another phone number automatically. This feature works at the telecom network level, meaning it does not depend on internet connectivity, apps, or smartphones. Whether your phone is busy, switched off, unreachable, or simply unattended, call forwarding ensures you never miss important calls.
This article explains call forwarding codes in detail, how they work, how to activate or deactivate them, their charges, real-life use cases, and important security considerations every mobile user should know.
KEY POINTS
What Is Call Forwarding and How Does It Work?
Call forwarding is a service provided by mobile operators that reroutes incoming calls from your number to another destination number. The forwarding happens before the call reaches your device, which is why it continues to function even if your phone is switched off or out of coverage.
Once activated, the telecom network automatically decides when and where to forward calls based on the forwarding rules you have set. These rules are configured using USSD codes (short dial codes).
Types of Call Forwarding
Call forwarding is not a single function—it works in multiple scenarios. Understanding these types helps you choose the right setup.
1. Unconditional Call Forwarding
All incoming calls are forwarded immediately to another number, without ringing your phone.
2. Call Forwarding When Busy
Calls are forwarded only when you are already on another call.
3. Call Forwarding When Not Answered
Calls are forwarded if you do not answer within a specific time period.
4. Call Forwarding When Unreachable
Calls are forwarded when your phone is switched off, has no signal, or is out of network coverage.
Call Forwarding Activation Codes (GSM – India)
These codes work on most GSM networks, including Jio, Airtel, Vi, and BSNL.
Forward All Calls
**21*MobileNumber#Deactivate:
##21#Check status:
*#21#Forward Calls When Busy
**67*MobileNumber#Deactivate:
##67#Check status:
*#67#Forward Calls When Not Answered
**61*MobileNumber#Deactivate:
##61#Check status:
*#61#You can also set a delay time (between 5 and 30 seconds):
**61*MobileNumber**Time#Example:
**61*9876543210**20#Forward Calls When Unreachable (Phone Off / No Signal)
**62*MobileNumber#Deactivate:
##62#Check status:
*#62#Cancel All Call Forwarding (Highly Recommended)
##002#This single command removes every active call forwarding rule on your number.
Voicemail and Call Forwarding
Most mobile networks automatically connect voicemail using call forwarding when:
- Your phone is busy
- You do not answer
- Your phone is unreachable
If voicemail is activated without your consent, disabling call forwarding for these conditions will usually stop it.
Charges and Billing Information
- Forwarded calls are typically charged as outgoing calls from your number.
- Incoming call charges may still apply depending on your plan.
- Charges vary by operator and tariff.
Always confirm with your network provider if you use call forwarding frequently.
Key Advantages of Call Forwarding
- Ensures you never miss important calls
- Works even without internet or smartphone
- Useful for business and customer support
- Ideal while traveling or using multiple SIMs
- Operates at network level, not device level
Wanna read = Indian bank account balance checking methods: Phone call, SMS, Internet Banking and Mobile Banking
Security Risks You Should Be Aware Of
Call forwarding can be misused if activated without your knowledge. In some cases, attackers enable forwarding to intercept calls or voicemail messages.
Potential risks include:
- Calls being secretly redirected
- Voicemail-based OTP interception
- Missed important or sensitive calls
How to Stay Safe
Regularly check your forwarding status using:
*#21#
*#61#
*#62#
*#67#If you see any unfamiliar number, immediately disable all forwarding using:
##002#Then restart your phone.
Call Forwarding via Phone Settings
You can also manage call forwarding through phone settings:
Android
- Phone App → Settings → Call Settings → Call Forwarding
iPhone
- Settings → Phone → Call Forwarding
However, USSD codes are more reliable, as they directly interact with the telecom network.
Common Real-Life Use Cases
- Business owners forwarding calls to assistants
- Customer support teams managing calls centrally
- Users traveling without roaming
- People using dual SIM or temporary numbers
- Avoiding missed calls during meetings
Final Thoughts
Call forwarding is a powerful and useful telecom feature when used correctly. Understanding the right codes, knowing when to enable or disable forwarding, and being aware of security implications ensures you stay in full control of your calls.
Every mobile user should periodically check their call forwarding status and know how to disable it instantly if needed.
