T-Mobile call forwarding codes and setup
T-Mobile uses GSM codes for call forwarding. Dial the code below, wait for confirmation, and calls route wherever you point them. There is no app required, though T-Mobile does let you manage forwarding from your account too.
The GSM system gives you real control: forward every call, forward only the ones you miss, or set your phone to ring a few times first and forward only if you do not pick up. That last mode is what most people actually want.
Metro by T-Mobile, Mint Mobile, and the other brands on the T-Mobile network use these exact same codes. Google Fi is the exception: it forwards only from the Fi app.
T-MobileNextPhone works with T-Mobile
The forwarding codes
T-Mobile**21*NextPhone number###21#**004*NextPhone number###004#Already a NextPhone customer? Get these steps with your own number filled in and ready to dial.
Open setupControl how many rings before it forwards
T-Mobile supports a no-answer timer, so your phone can ring a set number of times before an unanswered call forwards. Ring twice and forward, ring five times and forward, your choice. This is the setting that lets you keep grabbing calls when you are free while nothing lands in voicemail when you are not.
The number of rings is fiddly to set by hand, so the NextPhone app dials the exact code for the ring count you pick. The plain forward-all and forward-missed codes are shown above if you would rather type them yourself.
The same codes cover Metro and Mint, not Google Fi
Because Metro, Mint, Ultra Mobile, and dozens of other brands ride the T-Mobile network, they inherit T-Mobile forwarding codes. If a guide tells you Mint or Metro needs some special sequence, it does not. Use the codes above.
Google Fi is different. Google says Fi forwarding must be set up on fi.google.com or in the Google Fi app, not in your phone settings: Phone settings, Call forwarding, Always forward. When Google asks to verify the number, choose verify by call. Fi forwards every call; there is no missed-calls-only option.
iPhone Live Voicemail and call screening can intercept the call
On iPhone, T-Mobile lets you toggle forwarding from Settings, Phone. If forwarding looks set but calls still hit voicemail, the iPhone is answering on the device first. Go to Settings, Apps, Phone, turn off Live Voicemail and set Screen Unknown Callers to Never, then re-enter your code.
Forwarding set up but calls still not coming through? Our call forwarding troubleshooting guide covers the usual causes and fixes on every carrier.
After the call forwards
The forwarding code is the plumbing. The value is what picks up on the other end. Send your T-Mobile line to a NextPhone number and an AI receptionist answers and runs the whole call.
It books, answers questions, captures who called and why, and texts you a summary the moment the call ends. Unlimited calls, flat 199 dollars a month.
T-Mobile FAQ
Before you forward
your line.
Quick answers about forwarding your T-Mobile line
Still have questions? Contact our support team
Dial **21* your NextPhone number # to forward all calls or **004* your NextPhone number # to forward only the calls you miss. Turn forwarding off with ##21#. These are GSM codes, the same family AT&T uses.
T-Mobile supports a no-answer ring timer. Your phone rings a set number of times, then forwards if you do not answer. The NextPhone app dials the exact code for the ring count you choose.
Metro and Mint do: they run on the T-Mobile network and inherit the same GSM codes. Google Fi does not. Fi forwarding is set only in the Google Fi app or on fi.google.com, under Phone settings, Call forwarding.
Dial ##21# and wait for the confirmation tone. To clear a no-answer or conditional forward, the app can reset all of them at once.