T Mobile Conditional Call Forwarding Google Voice: How It Works

Conditional forwarding is different from forwarding all calls. With all-call forwarding, every incoming call goes somewhere else immediately. With conditional forwarding, your phone still rings normally. The call only moves to the destination number when a specific condition happens.

T-Mobile separates this into three conditions, each with its own code and its own off switch. That means you can, for example, send missed calls to one number while keeping busy calls going to your regular voicemail.

• No reply: the call moves after your phone rings without an answer
• Unreachable: the call moves when your phone is off or out of service
• Busy: the call moves while you are already on another call
• Each condition is turned on and off separately
• ##004# resets all forwarding to your line's defaults

These are the short codes T-Mobile publishes for call forwarding. Dial them from your T-Mobile phone and wait for the confirmation message before hanging up. Check that your specific plan and device support these codes; T-Mobile notes that service and device support should be verified.

• No-reply forwarding on: **61*1 then the 10-digit destination number, then #
• No-reply forwarding off: ##61#
• Unreachable forwarding on: **62*1 then the destination, then #
• Unreachable forwarding off: ##62#
• Busy forwarding on: **67*1 then the destination, then #
• Busy forwarding off: ##67#
• Reset all forwarding to defaults: ##004#

Google's support documentation explains that to send busy or unanswered calls from a cell line to Google Voice voicemail, you configure conditional forwarding on the cell line itself, not in the Voice app. The carrier controls when the handoff happens; Google Voice simply receives the call and records the voicemail.

In practice, that means dialing the T-Mobile codes above with your Google Voice number as the destination. Google also documents that carrier codes vary and that some reseller plans may not support conditional forwarding at all, so confirm your line supports it before relying on it.

• Set up happens on the T-Mobile line, not in the Google Voice app
• Use your Google Voice number as the destination in each code
• Test each condition separately: let a call ring out, call your line while busy, and check behavior with the phone off
• Google notes reseller plans may not support conditional forwarding

Google states clearly that forwarding calls from a Google Voice number to an automated system is unsupported. If you were hoping to chain T-Mobile to Google Voice and then to an automated receptionist, that path is not a supported setup.

The supported route is simpler: point your T-Mobile conditional forwarding directly at the answering destination you want. If that destination is AllDayDesk, you keep your existing T-Mobile number and forward calls to it. Calls, transcripts, summaries and bookings then show up in your AllDayDesk dashboard. Google Calendar can be connected optionally in Settings after you authorize your account, but that is a calendar connection, not a Google Voice one.

• Google Voice to an automated system is unsupported by Google
• Forward from T-Mobile directly to your answering destination instead
• Your public T-Mobile number stays the same; you just forward calls
• Google Calendar is an optional connection in AllDayDesk Settings, set up after you connect and authorize your account

Once your T-Mobile line can forward conditionally, the real decision is where missed calls should land. Google Voice voicemail gives you a recording and a transcription you check later. An answering service interacts with the caller instead: it answers questions using your saved business information, takes messages, and can book appointments into a calendar.

With AllDayDesk, setup starts by choosing your business or entering its website, checking the details it found, and hearing a personalized sample before you touch any phone settings. New appointments go to the built-in dashboard calendar by default once you have configured your services and availability. When the service does not know an answer, a price, or an open appointment slot, it takes a message for you instead of guessing. Changes to existing appointments are passed to you as requests, not confirmed on the spot.

• Voicemail: caller leaves a recording, you respond later
• Answering service: caller talks to something that can answer and book
• Transfers to you require you to configure a destination and rules, and neither pickup nor an immediate response is guaranteed
• The sample call you hear during setup does not create a real booking

A few things commonly go wrong, and each has a straightforward check. First, confirm you dialed from the T-Mobile line itself. Second, confirm your plan supports conditional forwarding; Google notes some reseller plans do not. Third, make sure you used the full 10-digit destination number. Fourth, remember that each condition is separate, so a working no-reply setting tells you nothing about the busy or unreachable settings.

If a setting will not activate, dial ##004# to reset forwarding to defaults and try the single condition again. If it still fails, contact T-Mobile support to confirm the feature is enabled on your line rather than retrying codes from another carrier, since codes differ between providers.

• Dial codes from the T-Mobile phone itself
• Verify the destination number is a full 10-digit number
• Test each condition separately
• Use ##004# to reset before reconfiguring
• Ask T-Mobile to confirm the feature on your specific plan