T-Mobile runs on the standard GSM codes: dial **21*, the 10-digit number you are forwarding to, then #, and every call forwards in about 2 minutes. **61* and **67* forward only missed or busy calls, and **004* sets all 3 conditional rules at once.
T-Mobile's calling services page routes you to per-device guides; the GSM codes below are the standard T-Mobile set those guides use.
Your AskSiya dashboard shows the dedicated local number Siya answers. The 7-day free trial creates one in minutes, no credit card needed.
Enter codes with digits only - 10 or 11 digit US numbers, no international destinations. Your business number stays yours.
The setup most restaurants and front desks want: staff answer when they can, Siya catches the rush, the second line and the after-hours calls. T-Mobile supports a conditional code per scenario:
On many devices you can also control how long your phone rings before no-answer forwarding kicks in: dial **61*, the number, then **11*, then the seconds (5 to 30 in steps of 5), then #. Example: **61*4695550123**11*20#. If your handset rejects that longer form, use the plain **61* code.
Conditional forwarding fires before T-Mobile voicemail, so missed callers meet a receptionist instead of a beep. Check what is active any time with *#21#, *#61#, *#67# and *#62#, and confirm oddball devices with T-Mobile support or 611.
Test all-call forwarding by calling your business number from another phone: Siya should answer in about one ring. Test conditional forwarding two ways: call while your line is on another call (busy path), then call and let it ring out (no-answer path). Each test appears on your dashboard with a transcript, so you can confirm exactly what callers hear.
To turn it off: dial ##21# to cancel all-call forwarding, ##61#, ##67# and ##62# for individual conditional rules, or ##004# to clear every conditional rule in one go. Calls then ring your phone exactly as before.
T-Mobile forwards the call; Siya answers it. She picks up 24/7 in about one ring, takes restaurant orders and hotel bookings straight onto your dashboard, speaks 100+ languages, and starts at $19/mo for 60 minutes with a 7-day free trial, no card required. Plans auto-upgrade as your call volume grows, so callers never hit a busy signal. Get your leak estimate from the free missed call revenue calculator.
On another carrier? See the guides for AT&T, Verizon, Google Voice, Rogers, Bell, TELUS and Freedom Mobile.
On many devices, yes: dial **61*, the number, then **11*, then seconds from 5 to 30 in steps of 5, then #. Example: **61*4695550123**11*20# gives staff about 20 seconds to answer before Siya takes the call. If your handset rejects the long form, use the plain **61* code.
It registers the same forwarding number for all three conditional cases - busy, no answer and unreachable - in one dial, and ##004# erases all three at once. It is the quickest route to the classic restaurant setup.
Dial *#21# for all-call forwarding, and *#61#, *#67# and *#62# for each conditional rule. Your phone displays whether the rule is active and the destination number registered.
Call forwarding is included with current T-Mobile plans; forwarded calls to US numbers are treated like normal usage, and international destinations are not supported for forwarding. When in doubt, confirm with T-Mobile at 611.
