Why Is My Call Forwarding To Another Number? | Fix The Route

Call forwarding is great when you switch it on. When it flips without warning, it’s stressful: callers say your phone never rang, calls drop into voicemail right away, or a stranger’s number shows up as the destination.

This walkthrough helps you pin down the cause fast. You’ll check your handset settings, carrier routing, and app rules, then shut off forwarding and lock the account so it stays off.

What Call Forwarding Means On Modern Phone Networks

Forwarding can live on your phone or on your carrier’s network. Phone-side forwarding is controlled in your settings. Carrier-side forwarding routes calls before your device rings, so it can still redirect calls even when your phone is off.

Forwarding also comes in two flavors: “always forward” and “conditional forward.” Conditional rules trigger only when you’re busy, don’t answer, have no signal, or your line is unreachable. Many carriers use conditional forwarding as the plumbing for voicemail, so a forwarding destination can appear even when you never set one.

Fast Signs Forwarding Is Active

• Callers reach another number after one ring or no rings.
• Calls jump to voicemail instantly with decent signal.
• Your carrier account lists a forwarding destination you don’t recognize.
• Verification calls for sign-ins never reach your phone.

Why Calls Forward To Another Number On Android And iPhone

Most “mystery forwarding” cases come from a small set of sources. The key is spotting which layer changed: handset, carrier, app, or account.

Carrier Voicemail And Conditional Routing

Carriers often route unanswered calls to a voicemail access number. That can show up in forwarding status screens or when you dial a status code. It’s normal when voicemail works and the destination belongs to your carrier. It’s not normal when the destination is a random mobile number or an out-of-area line.

Accidental Settings Changes

On iPhone and many Android phones, “always forward” can be turned on in a few taps. Dual-SIM devices add a twist: forwarding may be active on one line while the other line looks clean.

Forwarding Set In A Carrier App Or Web Account

Some carriers manage forwarding in their own apps or account portals. In that case, your phone can claim forwarding is off while the network still routes calls elsewhere. Plan changes, eSIM moves, and line feature resets can also reapply old forwarding rules.

Virtual Number And VoIP Apps

Services like Google Voice and business phone apps can forward calls to linked numbers. If you added a new phone, removed an old one, or changed verification, your linked list can change and call routing changes with it.

Call Handling Settings That Look Like Forwarding

Do Not Disturb, call screening, and spam filtering can send callers straight to voicemail or a block message. It feels like forwarding to the caller even when forwarding is off. It’s worth checking early because it’s a fast toggle test.

Account Takeover And Fraudulent Forwarding

Forwarding can be abused to intercept verification calls. If your carrier account shows an unknown forwarding destination, treat it as a breach: change credentials, add an account PIN, and remove forwarding at the carrier level the same day.

Step-By-Step Checks To Find Where The Forwarding Lives

Work in this order. After each step, call your number from another phone and see what happens.

1) Check The Phone’s Forwarding Menu

On iPhone

Open Settings, tap Phone, then Call Forwarding. If it’s on, switch it off. If you do use forwarding, verify the “Forward To” number is yours. Apple documents the exact path on Apple’s call forwarding steps for iPhone.

On Android

Open your Phone app, go to Settings, then Calls, then Call forwarding. Check every rule: Always, Busy, Unanswered, Unreachable. One of the conditional rules can be the culprit. If you don’t see a forwarding menu at all, your carrier may handle it with dial codes or an account portal.

2) Check Carrier-Level Forwarding In Your Account

Log in to your carrier website or carrier app and search for call forwarding, busy transfer, or voicemail routing. Disable any rule you don’t recognize, save, then test again.

3) Use Network Status Codes To Reveal Hidden Rules

Many carriers expose forwarding status through star codes. Codes vary by carrier and region, so treat results as a clue, not a guarantee.

• *#21# – Status for unconditional forwarding on many GSM-based networks.
• *#61# – Status for “no answer” forwarding on many GSM-based networks.
• *#62# – Status for “unreachable” forwarding on many GSM-based networks.
• *#67# – Status for “busy” forwarding on many GSM-based networks.

4) Check App-Level Call Routing

VoIP apps, business dialers, and “second number” apps can reroute calls. Check any apps that handle calling or voicemail. If you installed a new dialer, set your stock Phone app as default again and test.

Fixes That Usually Stop Surprise Forwarding

Once you’ve found the layer, these fixes cover most cases.

Turn Off Every Forwarding Rule

Clear “always forward” and every conditional rule, then reboot to force a fresh sync with the network.

Reset Network Settings When Rules Keep Returning

If forwarding turns back on after you disable it, reset network settings and then re-check forwarding. This can clear a stuck carrier configuration on the device.

Remove Forwarding At The Carrier Level When Needed

If your carrier portal still shows forwarding after you turn it off on the phone, remove it in the carrier account. If you can’t change it, ask the carrier to remove forwarding on the line.

What To Ask Your Carrier When You Call

If you end up on the phone with your carrier, you’ll get faster results if you ask for specific changes. Request removal of unconditional forwarding and every conditional rule (busy, no answer, unreachable). Ask them to read back the destination numbers on the line after they clear them.

If voicemail is the only destination left, ask whether that number is their voicemail access line for your plan. If you changed SIMs or moved to eSIM recently, ask them to re-provision the line so your device and the network agree on call routing.

Cause	Where It Shows Up	What Usually Fixes It
“Always forward” enabled	Phone settings	Turn it off, confirm the line (Dual SIM)
Busy / Unanswered / Unreachable rules	Call forwarding sub-menus	Clear each rule, save, reboot
Carrier portal rule	Carrier app or website	Disable on the account, then test
Voicemail routing number	Status codes show a carrier service number	Leave it if voicemail works; ask carrier if unsure
Virtual number linked list changed	VoIP or virtual number app settings	Update linked numbers and sign-in devices
Dialer app takeover	Default phone app changed	Switch default dialer back, remove the app
Fraudulent forwarding	Carrier account shows unknown destination	Change credentials, add account PIN, carrier removal
Wi-Fi calling or registration glitch	Calls skip ringing, hit voicemail	Toggle airplane mode, re-register on the network

Tracing The Destination Number Without Guesswork

If a status code shows a destination number, treat it like evidence.

• If it matches your carrier’s voicemail access line, it may be normal conditional routing.
• If it’s a full mobile number you don’t own, remove forwarding at once and secure the carrier account.
• If it’s a short code, search your carrier’s docs for that exact code and what it routes to.

When Forwarding Is Off But Calls Still Skip Your Phone

Sometimes forwarding is truly off, yet calls still land on voicemail. This usually points to call handling or network registration.

Re-Register Your Line

Toggle airplane mode on for 10 seconds, then off. If you use Wi-Fi calling, test on cellular only, then switch Wi-Fi calling back on.

Temporarily Disable Spam Blocking

Carrier spam filters can divert calls. Turn them off briefly and test with a known caller. On Google Fi, forwarding controls also live in the Fi account settings, and the official steps are listed on Google Fi’s call forwarding and caller ID page.

Confirm Voicemail Setup

If voicemail isn’t set up, some carriers still route “no answer” calls to a default mailbox. Set up voicemail, then test again.

Code Pattern	What It Checks	How To Use It
*#21#	Unconditional forwarding status	If active, disable in phone settings or carrier portal
*#61#	No-answer forwarding status	If it points to voicemail, it may be normal
*#62#	Unreachable forwarding status	If it points to an unknown number, remove forwarding fast
*#67#	Busy forwarding status	Clear it if you never set a busy rule
##002#	Cancel forwarding on some GSM networks	Dial, then re-check status codes to confirm
Carrier short codes	Carrier-specific controls	Check carrier docs for exact dial strings

Habits That Keep Forwarding From Returning

• Set a carrier account PIN and a strong password.
• Re-check forwarding after device swaps, SIM changes, or eSIM activation.
• Don’t dial star codes from random callers or texts.
• Audit linked numbers in any virtual number app when you add a device.

A Two-Minute Checklist When Calls Go Elsewhere

1. Check Call Forwarding on the phone and clear every rule.
2. Check the carrier account for forwarding features and disable unknown rules.
3. Run *#21# and *#62# and note any destination numbers returned.
4. Reboot, then test from a second phone.
5. If the destination is unknown, change carrier credentials and add an account PIN right away.