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Reddit
reddit.com › r/tmobile › aargh! finally solved t-mobile blocking of sms short codes
r/tmobile on Reddit: Aargh! Finally solved T-Mobile blocking of SMS Short Codes
February 16, 2019 -

TL:DR at the end.

Quick background: An SMS Short Code is 5-6 digit phone number that is used by businesses to send text messages. Some businesses use SMS Short Code messages for security. Dropbox is one of those. They offer a two-factor authentication method in which you log in with a username & password, then they send a text message from Short Code #732873 with a security PIN to finish your login.

I recently switched my phone to T-Mobile, and selected the Simple Choice plan, a month-to-month no-contract plan.

Next time I tried to log in to Dropbox, the app prompted me for a code that hey had sent via text. No text message. Tried again and again. No text.

Contacted Dropbox support, but for some reason they're fixated on sending a text code. Round and round, they wouldn't budge from requiring the code they sent - which I wasn't getting.

While that was going on I was calling T-Mobile support and getting the party line from them: "There's no text message block on your account, sir." They implied that Dropbox was screwing up. After several troubleshooting calls they escalated my problem, telling me that tech support was researching and would get back to me in 2-3 days.

Googling the issue repeatedly, I finally found this interesting line in a T-Mobile Support chat thread: Simple Choice No Credit Check accounts are restricted from receiving premium services and short codes.

So, I call T-Mobile again, this time responding to "There's no text message block on your account, sir" By saying: "I just found out that T-Mobile is blocking SMS Short Codes, and because of that I can't log into my Dropbox account. I need you to clear the Short Code block."

At that point I reached a service tech who fixed the problem in two minutes.

Why T-Mobile blocks Short Codes from Simple Choice No Contract customers is a question no one at T-Mobile could answer. They will enable it if you ask, but only if you ask the EXACT RIGHT QUESTION.

TL:DR T-Mobile blocks Short Code messages for Simple Choice No Contract customers, but only their 2nd level tech support seems to know this. To fix this, call T-Mobile, tell them that some service is sending you a PIN via Short Code and ask T-Mobile to un-block Short Codes.

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T-Mobile
t-mobile.com › support › plans-features › self-service-short-codes
Self-service & short codes | T-Mobile Support
Other codes used by T-Mobile include 500, 889, 909, 1003, 1167, 1511, 2903, 2957, 3340, 3700-4299, 5116, 5125, 5126, 5127, 5128, 5129, 6245, 6400, 6772, 7726, 8040, 8900, 9701-9901, 25107, 611611, and 444442000 - 444442999.
Discussions

short codes being blocked - Apple Community
Blocked again. Still able to text me. So frustrating. number is : [Personal Information Edited by Moderator] 536 3 · SMS codes My iphone 12 won't let me receive sms code. How can i fix this 216 1 ... I have the same issues. T-Mobile directed me to apple to try and get the issue fixed. More on discussions.apple.com
🌐 discussions.apple.com
March 6, 2022
Aargh! Finally solved T-Mobile blocking of SMS Short Codes
They do it to prevent you from being charged for premium text messages, which, I guess, must still be a thing. More on reddit.com
🌐 r/tmobile
57
100
February 16, 2019
Does T-Mobile block texts that contain verification codes from online banking sites?
Not, that I have noticed. I get them from my bank all the time which is reliant bank. I have also gotten them from the 2 step verification on one drive, from Chase, Capitalone, and Barclay. I also get short codes messages from Papa Johns, and other sites as well. You might want to check your phones messaging options, and make sure its not blocking them. I now a couple that had the option to block them if needed, but have never needed too. More on reddit.com
🌐 r/tmobile
26
7
April 25, 2015
Does t-mobile block text messages with short links?
Some links I try to send to people also get blocked and don't actually send. T-Mobile definitely is blocking them for some reason. And no, no blocks on my account. More on reddit.com
🌐 r/tmobile
15
0
October 5, 2023
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T-Mobile
t-mobile.com › t-mobile community › postpaid › accounts & services
Not receiving the text messages from short code numbers | T-Mobile Community
Since i got this new t-mobile account, i am not able to receive the text messages from the short code numbers. Any one know the solution of this?
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T-Mobile
t-mobile.com › t-mobile community › devices › apple
Not receiving commercial texts | T-Mobile Community
July 22, 2023 - I’m not receiving commercial texts, such as verification codes, on my iPhone 11
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T-Mobile
t-mobile.com › t-mobile community › devices › apple
Text code 128 and 2300 | T-Mobile Community
It took me a bit of time, but I was able to clarify with some of our messaging and billing teams that the 2300 code is used for Multimedia Messaging routing (think picture and group messages) and 128 is used by our voicemail system. These codes are used on the system side of things to deliver and confirm delivery of your important data, so it shows on the bill as a stamp. The phone does not show the short code because it receives the real important stuff; your messages and voicemails.
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T-Mobile
t-mobile.com › support › plans-features › message-blocking
Message Blocking | T-Mobile Support
We sent you a text to let you know we’ve removed this block so you can receive these important messages. In order to ensure you receive important messages—including communications like one-time PINs, security codes, promotional codes, appointment reminders, fraud alerts and more—we do not recommend blocking all messages.
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Bandwidth
bandwidth.com › home › blog › 3 things to know about t-mobile’s shared short code ban
T-Mobile’s Shared Short Code Ban: What You Need to Know
September 30, 2025 - T-Mobile has banned shared short codes. Learn how T-Mobile short code blocking could impact your business & why you should move to a dedicated number.
Find elsewhere
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T-Mobile
t-mobile.com › t-mobile community › devices › apple
No longer receiving texts with security codes | T-Mobile Community
As of this morning, I am not receiving required security codes to log on to websites via text. Is there a way to fix this on my iPhone? I have previously...
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JustAnswer
justanswer.com › android-devices › ajlpm-not-text-short-codes-j7-no-blocked-numbers.html
T-Mobile Short Codes: Troubleshooting and Solutions
Since these codes can occasionally lead to recurring charges, providers typically place a block on these short codes by default. Have you had the service provider check for any blocks?
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T-Mobile
t-mobile.com › t-mobile community › prepaid › billing
Regularly charged for undelivered text messages from T-Mobile short code 2519 | T-Mobile Community
September 11, 2024 - Then i noticed in the activity ... blocking all incoming text messages before. After some research I learned, that short codes cannot be blocked by this blocking control on the account....
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Message Central
messagecentral.com › blog › why-cant-i-text-a-short-code
Why Can't I Text a Short Code? | Message Central Blog
December 14, 2024 - You’d need to check with your carrier to see if they support the specific short code you are trying to text. ... Your mobile plan might not include access to short code messaging.
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T-Mobile
t-mobile.com › t-mobile community › postpaid › accounts & services
Blocking SMS Short Code Texts From Third-Party Service I Paid For | T-Mobile Community
Unfortunately, T-Mobile has been blocking their text messages during the past year and the service reports that they have other T-Mobile clients that have had their messages unblocked and I should contact T-Mobile to have this fixed. This has caused me to lose thousands of dollars in services I provide and has given me a bad reputation for not responding to appointments with these other companies. I see that you’ve unblocked others. Would you please unblock SMS short codes from third-party services to my account as well?
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T-Mobile
t-mobile.com › community › discussions › website-app › short-code-black-list › 197002
Short code black list | T-Mobile Community
1 month ago - I am not receiving text messages from 5-digit short codes like 53746. Can you please check my account for a 'Short Code Blacklist' or 'Premium Content/SMS...
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Apple Community
discussions.apple.com › thread › 253721996
short codes being blocked - Apple Community
March 6, 2022 - My new iPhone 13 can't receive short code texts from T-Mobile. Did the Airplane Mode thing and that hasn't worked.
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T-Mobile
t-mobile.com › t-mobile community › devices › android
Can't get short SMS codes | T-Mobile Community
I am trying to get a verification code but the short SMS codes don't seem to get to me. I was told that T-Mobile might be blocking them. How can I fix this??
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Howard Forums
howardforums.com › home › us prepaid/mvno discussion › t-mobile prepaid/metro
SMS shortcodes on T-Mobile prepaid? [The answer is now YES.] | Howard Forums - Your Mobile Phone Community & Resource
February 12, 2012 - SMS short codes have worked for quite a while now. 4Info (44636) and Google (46645) work perfectly on prepaid. I've used them on both the PAYG and per-day plans. Just make sure you have a sufficient balance. I'm sure others now work as well. ... Thanks. That was a peculiar deficiency of the T-Mobile prepaid service, and for me a dealbreaker. I'm not sure if T-Mobile ever publicly disclosed that shortcodes were blocked ...
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PixelsSEO
pixelsseo.com › home › pixels seo blog › all › t-mobile short codes blocked? the ultimate guide to unblock sms & fix it fast
T-Mobile Short Codes Blocked? The Ultimate Guide To Unblock SMS & Fix It Fast
August 11, 2025 - If you’re a T-Mobile customer and suddenly find that T-Mobile short codes are blocked, you’re not alone. The inability to receive texts from 5- or 6-digit
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Norton
us.norton.com › blog home › mobile › what to dial to see if your phone is hacked: 9 useful codes
What to dial to see if your phone is hacked: 9 useful codes
March 27, 2025 - While *#21# should work for any 4G, 5G, or GSM networks like AT&T and T-Mobile, if you’re a Verizon or US Cellular customer on an older CDMA network, try alternate codes like *92 or *72.