Connection problems or invalid MMI code

[TheEggMan]

None of the MMI codes I punch into my dial pad work. I keep getting the error "connection problems or invalid MMI code" 

Code Function
*#0*# Access diagnostics
*#011#Network details and serving cell information
*#0228#Battery status
*#0283#Loopback Test menu
*#0808#USB Setting
*#1234#Software version/ Model details
*#2663#Firmware details(Advanced)
*#7353#Quick test menu
*#9090#Advanced debugging tools
*#9900#SysDump
*#2683662#Service mode(Advanced)
*#34971539#Camera firmware details

I want to be able to utilise all of the above.

Samsung haven't been overly helpful on this matter and they keep fobbing me off to my phone network saying this is an issue on their side, but I disagree. These codes are coded into the device by Samsung, not my phone network. 

I have attempted everything online, to no avail 

[Tourbillon De La Vie]

It is not a given that those codes will on every Samsung device. What firmware are you on? 

[TheEggMan]

I am on the latest, Android 14.

The above list was on a forum I found which states these should work on the S23.

[carguy143]

Turn off auto blocker as I found this stopped many codes from working, including the standard *#06#

[TheEggMan]

Where can I find this please?

[TheEggMan]

Never mind, I found it, however this made no difference. Thank you though

[-Robot-]

Because you saw it on a forum, then it must work? Think through that logic

[TheEggMan]

Well they all work on my partners Z flip 🤷‍♂️

[-Robot-]

Well as you can see they don't work as stated on a forum

[Lynnmac72]

I have the same exact phone and I was on the phone with my carrier for 45 mins.  I spoke with 2 reps and would not believe, they had no clue what mmd codes were.  And they work for a mobile phone company.   And if that wasn't bad enough, I called samsung and he too did not know what a mmd code was.  He insisted I meant mck (used to unlock phones from carriers. ) I finally just got fed up and gave up after an 1hour of wasted time.   So... samsung.... are you going to respond and fix this?