What Is Unconditional Call Forwarding?
Unconditional call forwarding, also called call forward all or forward always, sends every incoming call to a number you choose, regardless of what your phone is doing. While it is active, your own phone does not ring, and callers connect directly to the destination.
It suits situations where you cannot or do not want to answer at all: traveling, taking time off, closing a shop for a day or sending a business line to a mobile. Its risk is that it is easy to forget. A phone left on unconditional forwarding silently diverts calls for days.
What Is Conditional Call Forwarding?
Conditional call forwarding sends a call elsewhere only when a specific condition is true. Your phone rings first, and forwarding acts as a backup. There are three common conditions.
Forward when busy If you are already on a call, new callers go to the forwarding number. Without it, they would hear a busy signal or voicemail.
Forward on no answer If you do not pick up within a set time, usually 15 to 30 seconds, the call moves on. This is the most useful rule for most people.
Forward when unreachable If your phone is switched off, out of coverage or offline, calls go to the backup so they are not lost.
Because conditional forwarding lets you answer first, it keeps your main number in charge while still protecting against missed calls.
Conditional vs Unconditional Call Forwarding: Differences at a Glance
| Feature | Unconditional | Conditional |
| When calls are forwarded | Always, immediately | Only when busy, unanswered or unreachable |
| Does your phone ring? | No | Yes, until the condition applies |
| Best for | Away, closed, or fully redirected lines | Backup coverage and overflow |
| Risk | Forgetting it is on and missing calls | Backup number not answering either |
| Typical setup | One destination | One destination per condition |
| Other names | Call forward all, forward always | Busy, no answer, unreachable (no reply) |
Call Forwarding Codes
Many mobile networks follow a common standard for activation codes. Codes can vary by carrier and country, so treat these as a guide and check with your provider.
| Action | Code format | Example |
| Forward all calls (unconditional) | **21*number# | **21*15551234567# |
| Forward when busy | **67*number# | **67*15551234567# |
| Forward on no answer | **61*number# | **61*15551234567# |
| Forward when unreachable | **62*number# | **62*15551234567# |
| Forward all conditional types | **004*number# | **004*15551234567# |
| Cancel a type | ##code# | ##21# cancels forward all |
| Check status | *#code# | *#21# shows forward all status |
| Cancel all forwarding | ##002# | Clears every forwarding rule |
Some US carriers use different shortcuts. A common pattern is *72 followed by the number to forward all calls and *73 to cancel, while *71 followed by the number sets forwarding for busy or no answer. Always confirm with your carrier, because the same code can mean different things on different networks.
When to Use Unconditional Forwarding
- You are traveling or unavailable and want every call handled by someone else.
- You are closing a location and sending the line to another branch.
- You are moving to a new number and want old calls redirected for a while.
- A business line should always ring a particular mobile or team instead of a desk.
When to Use Conditional Forwarding
- You usually answer, but want a backup if you are on another call.
- You want unanswered calls to reach a colleague or voicemail after a few rings.
- You work in places with patchy signal and want calls caught when you are unreachable.
- You run a small team and want overflow to move to the next person.
Many people combine both: conditional rules for normal days and unconditional forwarding for planned absences. Whichever you pick, set a sensible ring time before the call moves on, because too short a time forwards calls you would have answered.
Conditional and Unconditional Forwarding on Business Phone Systems
On a VoIP business system the same ideas apply, but the rules sit in a dashboard instead of dial codes, and there are more options. You can forward by time of day, by caller, to several people at once or in sequence, and you can set holiday rules. Because the forwarded call is a second call leg, forwarding to an outside number may use per-minute charges, so check your plan. This is how call forwarding works for most companies, and the rules can be changed in seconds from anywhere.
How to Set Up Forwarding
- Decide the type. Choose always-forward for planned absences or a conditional rule for backup.
- Choose the destination. Use a number that will actually answer, with a voicemail fallback.
- Activate it. Use the dial code from the table, the phone's call settings, or your business phone dashboard.
- Set the ring time for no-answer rules.
- Test it. Call your number from another phone and confirm the right device rings.
- Turn it off when done. Use the cancel code, or switch the rule off in your settings.
Troubleshooting
"Conditional call forwarding active" appears on screen: Your phone has a conditional rule enabled. Check the status code *#004# or the call-forwarding menu, and cancel the rules you do not want.
Calls forward when they should not A conditional rule may still be on from earlier, or your ring time is too short. Cancel old rules and lengthen the time.
Calls do not forward Check the destination number is correct, with the country code if needed. Make sure the destination is not busy, and confirm your plan allows forwarding to that kind of number.
Voicemail answers first Your carrier's voicemail may pick up before the forward starts. Lower the ring time or turn off the carrier voicemail for forwarded calls.
Calls loop Two phones forwarding to each other create a loop. Remove the rule on one side.
Forwarding stuck on Dial the cancel code for the type, or the code to cancel all forwarding, then check status again.
Unexpected charges Forwarding to mobile or international numbers can cost money. Review rates before activating.
Security Tips
A forwarding rule you did not set can mean someone has access to your account. Check status regularly, use strong passwords and two-factor authentication on carrier and VoIP accounts, and cancel rules you do not recognize. Do not give out your PIN or account details to unknown callers who ask you to dial forwarding codes, since some scams use them to redirect your calls and verification codes.
Next step
Ready to Get Started?
Use unconditional forwarding when you are out of reach and conditional forwarding when you want to answer first with a safety net. Test every rule, add a fallback and turn off what you no longer need.
Calilio supports ring strategies, voicemail-to-email, call flip and number porting, and every plan includes a free local number in the US, Canada or UK.
Frequently Asked Questions
What is the difference between conditional and unconditional call forwarding?
Unconditional forwarding sends every call to another number immediately and your phone does not ring. Conditional forwarding sends a call only if your line is busy, you do not answer or your phone is unreachable.
What does "conditional call forwarding active" mean?
It means your phone has one or more conditional forwarding rules switched on, such as forward when busy or on no answer. You can check and cancel them using the status and cancel codes or your phone's call settings.
How do I turn off call forwarding?
Dial the cancel code for the type you set, such as ##21# for forward all, or ##002# to cancel every rule. You can also switch it off in your phone's call settings or your business phone dashboard.
Which is better, conditional or unconditional forwarding?
Neither is better in general. Choose conditional when you want to answer first with a backup, and unconditional when you cannot take calls at all.
Can I use both at once?
Typically, unconditional forwarding takes priority because it redirects all calls before conditions are checked. People usually use conditional rules day to day and switch on unconditional forwarding for planned absences.
Do forwarded calls cost money?
Sometimes. Forwarding to a mobile, landline or international number can use minutes or per-minute charges. Forwarding between users on the same business phone account is usually free. Check your plan.
Does forwarding work if my phone is off?
Only the unreachable condition, or unconditional forwarding, handles that. A conditional rule for no answer may also work depending on the network. Set unreachable forwarding if you often lose signal.
Will the caller know their call was forwarded?
Generally no. They hear ringing and then a person answers, although there can be a brief delay.
Do forwarding codes work on every carrier?
Many follow the same standard, but not all do, and some use their own shortcuts. Check your carrier's instructions before relying on a code.