Burada "koşulsuz" aslında ne anlama geliyor?
Koşulsuz çağrı yönlendirme, gelen her çağrıyı istisnasız, anında başka bir numaraya yönlendirir; meşgulken, cevaplanmadığında veya kapsama alanı dışındayken. Bu "her zaman" ayarıdır ve bu şekilde yönlendirilen bir çağrı asla orijinal telefonu çalmadığından karışıklığa neden olma olasılığı en yüksek olan ayardır.
Bu kılavuz, onu koşullu iletmeden farklı kılan özellikleri, onu doğrudan ağ üzerinden etkinleştiren etkinleştirme kodlarını ve insanların gerçekte kullandığı cihazlardaki kurulum adımlarını kapsar.
Koşulsuz ve koşullu: önemli olan fark

Koşulsuz iletme bir kez etkinleştirilir ve manuel olarak kapatılana kadar her aramada etkin kalır. Orijinal telefon asla çalmaz; her çağrı doğrudan iletme hedefine gider.
Koşullu iletme yalnızca belirli durumlarda etkinleşir: hat meşgul olduğunda, belirli sayıda çalmanın ardından yanıt gelmediğinde veya telefona ulaşılamadığında (kapalı veya kapsama alanı dışında). Bu üç koşulun her biri, koşulsuz yönlendirmeden ayrı olarak kontrol edilir ve bir telefonda aynı anda birden fazla etkin durum bulunabilir.
Bu ayrım önemlidir, çünkü birini kapatmak diğerine etki etmez; bu, yalnızca bir türü devre dışı bıraktıktan sonra hala çağrıları yönlendiren bir telefonda sorun giderme işlemi yapan herkes için ortak bir kafa karışıklığı kaynağıdır.
Aktivasyon kodları

Dünya çapındaki çoğu GSM ağında, koşulsuz yönlendirme, ekrandaki menülerden bağımsız olarak, bir yıldız kodu kullanılarak doğrudan ağ üzerinden kontrol edilir:
- Etkinleştir: aramak
*21*[destination number]#ve ara tuşuna basın. - İptal etmek: aramak
##21#ve ara tuşuna basın. - Durumu kontrol et: aramak
*#21#and press call — the screen shows whether it's active and which number calls are being sent to.
These codes work on the network level, which means they function even on phones where the setting is buried in a confusing menu or missing entirely. They come from the standard call-forwarding MMI codes built into the GSM network layer, for anyone who wants the technical background.
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iPhone ve Android'de ayarlama
On iPhone: open Settings, then Phone, then Call Forwarding, then toggle it on and enter the destination number. This maps directly to the *21* code above, just through a menu instead of a dialed code.
On Android: open the Phone app, tap the three-dot menu, go to Settings, then Calls, then Call Forwarding, and select "Always forward" (wording varies slightly by manufacturer). Enter the destination number and confirm.
If either menu path doesn't work — which happens more often on carrier-locked or CDMA devices — the *21* star code works directly through the network regardless of what the phone's own settings show.
Koşulsuz iletmenin gerçekte kullanıldığı yerler

Temporary full redirects. Forwarding every call to a personal or backup number while a business line is unattended — during a closure, a move, or before a new system is fully set up — is the most common legitimate use.
Testing a new number before switching over. Businesses migrating to a new number sometimes forward the old one unconditionally to the new line during a transition period, so callers on the old number reach the right place without needing to know anything changed.
Multi-location routing. A single published number can unconditionally forward to whichever location is actually staffed that day, which is one of the simpler routing patterns available before setting up a full auto-attendant or IVR menu.
Businesses running this kind of setup at any real scale typically move it into a UCaaS (Unified Communications as a Service) platform — a single cloud system for calling, messaging, and video — where forwarding rules can be managed centrally across every line instead of dialing star codes on individual phones, the same shift covered in our guide to turning off call forwarding for the reverse case. My Country Mobile handles this kind of centralized call routing for business numbers. Contact us to set up forwarding rules across a full team rather than device by device.
En çok kafa karışıklığına neden olan hata

Turning off unconditional forwarding does not touch conditional forwarding, and vice versa — they're controlled independently even though both fall under the umbrella term "call forwarding." Anyone troubleshooting a phone that's still redirecting calls after disabling one type should check all four settings (unconditional, busy, no-answer, unreachable) rather than assuming one cancels the rest.
Çözüm
Unconditional call forwarding is the simplest of the forwarding types conceptually — every call, no exceptions — but it's also the one most likely to get left on by accident, since nothing on the original phone indicates it's active beyond the setting itself. The *21* and ##21# codes work reliably across GSM carriers regardless of what a phone's menu shows, which makes them worth knowing even for anyone who normally manages forwarding through settings instead.
Temel çıkarımlar
- Unconditional forwarding redirects every call immediately — the original phone never rings at all while it's active.
- It's controlled independently from conditional forwarding (busy, no-answer, unreachable), so turning off one doesn't affect the others.
- The
*21*[number]#code activates it,##21#cancels it, and*#21#checks its status on most GSM networks. - Common legitimate uses include temporary redirects, number migrations, and multi-location routing.
- At business scale, centralizing this in a UCaaS platform replaces manually dialing star codes on individual phones.
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What does "unconditional" mean in call forwarding?
It means every incoming call is redirected immediately with no exceptions — not just when busy or unanswered. The original phone never rings while it's active.
What's the code to turn on unconditional call forwarding?
*21*[destination number]# activates it on most GSM networks. ##21# cancels it, and *#21# checks whether it's currently active.
Does turning off unconditional forwarding also turn off conditional forwarding?
No. They're controlled independently. Turning off unconditional forwarding leaves any active conditional settings (busy, no-answer, unreachable) untouched.
Will the caller know their call was forwarded unconditionally?
Usually not. The call connects to the forwarding destination with no notice to the caller in most cases.
Can I set up unconditional forwarding without codes, using just my phone's settings?
Yes. Both iPhone and Android have a menu-based toggle for this that maps to the same underlying network setting as the *21* code.
Why would a business want every call to unconditionally forward somewhere else?
Common reasons include a temporary closure, migrating to a new number during a transition, or routing a single published number to whichever location is staffed that day.






