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SMARTY Call Forwarding Code on iPhone

Last updated: June 2026 · SMARTY · iPhone

SMARTY call forwarding uses standard GSM codes dialled from your iPhone. This guide lists every SMARTY forwarding code, explains what each one does, and shows you how to set, check and cancel forwarding from your iPhone.

In this guide
  1. Forwarding codes reference
  2. How to set forwarding
  3. Common causes
  4. Frequently asked questions

SMARTY Call Forwarding Codes for iPhone

Forward all calls to a number
Dial **21*[phone number]# and press Call. Replace [phone number] with the full UK number to forward to (e.g. **21*07911123456#). SMARTY will confirm when active.
Forward calls when unanswered
Dial **61*[phone number]*11*30# and press Call. This forwards calls to voicemail or another number after 30 seconds of ringing on SMARTY.
Forward calls when busy
Dial **67*[phone number]*11*30# and press Call. Calls diverted when your iPhone is engaged go to the forwarding number on SMARTY.
Forward when unreachable or off
Dial **62*[phone number]*11*30# and press Call. Activates forwarding when your iPhone is switched off, in Airplane Mode, or out of SMARTY coverage.
Check current forwarding status
Dial *#21# and press Call to check unconditional forwarding status. Dial *#61# to check conditional (unanswered) forwarding status on your SMARTY number.
Cancel all call forwarding
Dial ##002# and press Call. This cancels all active call forwarding rules on your SMARTY number in a single command. Works from any iPhone.
Troubleshoot if codes fail
If GSM codes fail, ensure you have active SMARTY signal. Alternatively, use the SMARTY app or website to manage call forwarding settings — app-based forwarding does not require signal.

Common Causes of This Issue on SMARTY

CauseLikelihoodFix
No signal for USSDHighTry in better signal area
Code format wrongMediumUse exact format: **21*[number]#
Account restrictionLowUse carrier app instead

Frequently Asked Questions

What is the SMARTY call forwarding code?

To forward all calls on SMARTY, dial **21*[number]# and press Call. To cancel all forwarding, dial ##002#. To check forwarding status, dial *#21#. These are standard GSM codes that work on any iPhone on SMARTY.

How do I forward SMARTY calls to voicemail?

Dial **61*SMARTY app → Voicemail*11*30# to forward unanswered calls to SMARTY voicemail. Dial **67*SMARTY app → Voicemail*11*30# for busy calls. Dial **62*SMARTY app → Voicemail*11*30# when your iPhone is off or out of signal. All three together restore full voicemail functionality.

Why are SMARTY forwarding codes not working?

Forwarding codes require active SMARTY signal to process. If codes fail, try in an area with stronger signal. If the issue persists, contact smarty.co.uk live chat — some SMARTY account types restrict USSD code usage and require forwarding to be configured via the SMARTY app instead.

Still having trouble? Contact SMARTY support on smarty.co.uk live chat or visit our contact page for further help.