US cell phone network Checked September 2026
T-Mobile call forwarding codes
To forward calls you don't answer on T-Mobile, dial **61*1, the 10-digit number, then **20# so your phone rings for 20 seconds first. Dial **21*1, the number and # to forward every call, and ##61# or ##21# to turn it off.
- Put 1 before the number
- Ring time 5 to 30 seconds
- US numbers only
**61*15550100123**20#Dial it from the phone you want to forward, then wait for the confirmation.
- Turn off
All T-Mobile call forwarding codes
Replace NUMBER with the number you want calls to go to.
| Forward calls | Turn on | Turn off |
|---|---|---|
| No answer | **61*NUMBER**20#
Off: ##61# | ##61# |
| Busy | **67*NUMBER#
Off: ##67# | ##67# |
| Unreachable | **62*NUMBER#
Off: ##62# | ##62# |
| All calls | **21*NUMBER#
Off: ##21# | ##21# |
- Ring time: change the 20 to anything from 5 to 30 seconds, in steps of 5.
- T-Mobile only forwards to 10- or 11-digit numbers, and not to international numbers.
- Forwarding while roaming abroad depends on the host country's network.
How to forward calls on T-Mobile
- 1
Check when calls will forward
This code sends calls you do not answer to the destination number.
- 2
Dial the code
From your T-Mobile cell phone, dial **61*NUMBER**20#, replacing NUMBER with the number calls should go to.
- 3
Check the result
Follow any prompts on your phone. If the request is rejected, check the instructions for your service before trying again.
- 4
Test it
Ring your number from another phone without answering it. Check that the destination receives the call. To turn it off later, dial ##61#.
How to turn off call forwarding on T-Mobile
Dial the code that matches the forward you set up. Calls go back to ringing your phone as normal.
- No answer
-
##61# - Busy
-
##67# - Unreachable
-
##62# - All calls
-
##21#
What to know about call forwarding on T-Mobile
The 1 before the number
T-Mobile writes its forwarding codes with a 1 in front of the 10-digit number, as in **21*1 followed by the number and #. The code builder adds the 1 for you. T-Mobile accepts 10- or 11-digit numbers.
Choosing the ring time
Add ** and a number of seconds before the final # of the no-answer code to set how long your phone rings before the call moves on. T-Mobile allows 5, 10, 15, 20, 25 or 30 seconds. In T-Mobile's own example, **61*18056377243**10#, the phone rings for 10 seconds before the call moves on.
Resetting forwarding
Each kind of forwarding has its own off code, listed in the table above. T-Mobile also lists ##004#, which resets call forwarding to default. It is useful if you have tried several codes and are no longer sure what is set.
Forward calls from your phone's settings
Your phone may also offer call forwarding in its settings, depending on your device and plan. The iPhone Call Forwarding switch sends every call on. Use a supported no-answer option if you want your phone to ring first.
iPhone
- Open Settings, then Apps, then Phone (on older iOS, Settings then Phone).
- Tap Call Forwarding and switch it on. If you use two SIMs, choose your business line first.
- Tap Forward To and enter the number calls should go to.
- Go back. A forwarding icon shows in the status bar while it is on.
Android
- Open the Phone app, tap the three-dot menu, then Settings.
- Tap Calls (or Supplementary services, depending on the phone), then Call forwarding.
- Choose When unanswered so your phone rings first and only missed calls move on.
- Enter the number, tap Turn on, and pick the right SIM if asked.
If the code doesn't work
"Connection problem or invalid MMI code"
The network did not accept the request. Check you have signal, turn off Wi-Fi calling and airplane mode, then dial the code again exactly as shown.
"Setting activation failed" or "unsuccessful"
The network refused the divert. Some plans block diverts to other numbers, and some networks want the number in international form. Check the notes on this page, or set it up in your phone settings instead.
Calls still go to voicemail
Voicemail is itself a divert, and only one can be active for each condition. Setting a new divert replaces the voicemail one. If calls still reach voicemail, cancel all diverts and set yours again.
T-Mobile call forwarding questions
How do I turn off call forwarding on T-Mobile?
Dial ##21# to stop forwarding all calls, ##61# for unanswered calls, ##67# for busy and ##62# for unreachable. T-Mobile also lists ##004#, which resets call forwarding to default.
How do I forward calls from T-Mobile to another number?
Dial **21*1, the 10-digit number, then # to forward every call. To have your phone ring first, dial **61*1, the number, then # instead.
How do I change how long my T-Mobile phone rings before forwarding?
Add ** and the number of seconds before the final # in the no-answer code, for example **61*1, the number, then **15#. T-Mobile allows 5 to 30 seconds in steps of 5.
Can I forward T-Mobile calls to an international number?
No. T-Mobile only forwards calls to 10- or 11-digit numbers and does not allow international numbers.
What does ##004# do on T-Mobile?
T-Mobile lists ##004# as the code that resets call forwarding to default.
Sources
Checked in September 2026 against the official pages below. Networks change codes and prices, so if something here stops working, their page is the final word.
