Outbound callerID blocking my number despite settings

Aw man. We definitely don't want folks to avoid your calls because of your caller ID. The ticket is a good last resort to get this resolved and there should be updates on the ticket after about 3 days. Have you reached out to tech care folks to see if there is any news? There is a way to get it updated and sent back to engineering if this is still an issue.

I haven't used the "gewneral" GSM codes in ages - because most phones now  have most common codes built into their menue system.

  Here is one site that lists most of the codes:  GSM Feature Codes      Do a Google search - "GSM Codes"

Caller ID / Call Display

If you wish to either show or hide your phone number on outgoing calls then you may either set this on your phone's menu or manually enter the code before dialing. These codes will override whatever menu setting you have on a per-call basis.

Do not display: #31#[phone number]
Display: *31#[phone number]
Status: *#31#

North American GSM service providers also support the landline codes for this feature (these also work on CDMA and iDEN phones):
Do not display: *67[phone number]
Display: *82[phone number]

There are also codes to show or prevent incoming numbers from being shown on your handset if you subscribe to this feature. I'm not too sure why you'd want to do this, but just in case you do:

Do not display: #30#
Display: *30#
Status: *#30#

Hi, @privacy789​! Just wanted to check in and see if you'd noticed any change or update since that ticket was submitted. One thing that might be worth noting is that there are two major Caller ID vendors, so when we perform an update (like changing the name field to "Unknown Caller") those updates will happen with any customer that subscribes to service from a company that uses the same vendor as T-Mobile pretty quickly. However, the other vendor's clients will not see the change in your Caller ID until their particular carrier/landline company performs a routine update to their Caller ID system. For some companies this is quarterly, and for some it might happen every six months. Mike is correct, there are escalation processes we can follow if this isn't getting resolved for a person you're calling who uses the same vendor as T-Mobile, so if you're still having trouble, we'd definitely like for you to reach out.

Did you try entering -- *31#[phone number]    ​then send that code like it was a text msg.    (It might work w.o. entering your phone number)

It’s 2021 and I’m having the same issue. I don’t want my name broadcast to everyone I call, but I DO want them to see my phone number. My own mother doesn’t know when it’s me calling her because T-Mobile can’t figure this out — a standard feature with other carriers. Was trying to call emergency veterinary services for my friend’s cat after he was hit by a car — they wouldn’t take my call because caller ID was blocked, a setting I never asked for. One tech support person even told me she understood why I would want this setting changed, that it made perfect sense to her, but no one has been able to figure out how to do it.