USSD code running, connection problem or invalid MMI code - AT&T Samsung Galaxy S8+ Questions & Answers

Good morning all,
I'm trying to use *1234# and other numbers and I get subject error on my new Galaxy S8+ on AT&T
Model # SN-G955U
Baseband version: G955USQU1AQD9
Can anybody tell me how to fix this?
Thank you,
Dave

also, facing the same problem
Sent from my LA2-S using Tapatalk

[QUOTE=aminu

Try *#1234#
Sent from my SM-G955U using Tapatalk

i have the solution for this............................

Related

Camera firmware

In reference to this topic: http://forum.xda-developers.com/showthread.php?t=1287134
Can you tell me what version of camera firmware you have? if the code is the same, you must enter *#34971539# and tap on the first item!
And the "ISP Ver Check" (3rd item)!
Please help to solve this strange problem that affects some Galaxy S II!
hum...nobody?
[NEC CE147]
Sent from my SAMSUNG-SGH-I997 using XDA App
many thanks!
im on infused and nothing comes up on punching those no.s i guess u have to be on stock firmware to get details.
Connection problem or invalid MMI code......

[Q] No texting?

Hi , something's going wrong with my nexus .. I can make calls, I get data, but for some reason I can't text! I tried on Nexus Sense 1.1 and then Kangy by HAKA .. still no luck? HELP! :\ Please?
did you try check your smsc no? to check go dial *#*#4636#*#* mine was lost once, but manage to got it back..
Theres nothing there .. and when I press refresh I just get 00 .. help me ?
Sent from my Nexus S using XDA App
You could try to re-enter it in PDU format
www.twit88.com/home/utility/sms-pdu-encode-decode
If your SMSC is: +16478000106, then enter: 07916174080001F6
How do I find my smsc , where do i click to get it what do i do !? :/ kind of a newb at this :$
Sent from my Nexus S .. with sense ... using XDA App
you should google for you carier smsc no..then using online pdu converter, convert and update in your nexus...
The alternative is to put you sim card in dumb phone to directly input your smsc no..
Sent from my Nexus S using XDA App
Use this guide: http://forum.xda-developers.com/showthread.php?t=979564
Anyone know the SMS centre number for Mobilicity ? Can't find it online :\
I have this exact same problem... just made a thread about it on Howard forums too. Did you ever get it fixed?
Beako said:
I have this exact same problem... just made a thread about it on Howard forums too. Did you ever get it fixed?
Click to expand...
Click to collapse
What the hell? I've had this problem on and off for about a week with my Koodo Nexus S.
Support told me to update the SMSC manually by doing *#*#4636#*#*
The SMSC number FOR KOODO is +16475800172 or in PDU format 07916174850071F2
My problem is that when I try to update the SMSC, the number won't stick. I hit update and it gives me an update error. The previously quoted XDA post doesn't help.

USSD problem, MMI error

hi
when i pres *133# that massege appear (ussd problem and mmi error)
im in iraq may phone is lg g2x un lock ad work with any gsm sim card
pleas .....
Are you 100% sure it's unlocked?
Sent from my LG-P999 using xda app-developers app
thank you for replay
in can call and send and receve call and massage
note>>> the internet dont work i think from that resion
also>>> in stock rom 2.2 the internet work fine
but now i need th resolve problem of how to now the balance such as *133#
thank you
igi2000 said:
thank you for replay
in can call and send and receve call and massage
note>>> the internet dont work i think from that resion
also>>> in stock rom 2.2 the internet work fine
but now i need th resolve problem of how to now the balance such as *133#
thank you
Click to expand...
Click to collapse
Have you resolved the issue? I am experiencing a quite similar problem with my Motorola XT912. The thing is that it works on some ROMs but it doesn't on just a few.
No..the problem has not reslived
..that still the same problem in my phone
Sent from my LG-P999 using xda app-developers app

i535 USSD codes not working

Hello, I'm using this phone overseas. everything works, gsm, messaging, umts but USSD doesn;t work. I get error message ,,Connection problem or invalid MMI code''. Please, help me how can I fix that? I;m on 4.3 stock. Thanks!
http://forum.xda-developers.com/showthread.php?p=27926167
Sent from my SM-G900V using Tapatalk
I'm sorry, didn't notice. Please, move in appropriate department.

USSD codes not working

I'm using The Global Elite ROM and I'm trying to calibrate battery using *#0228# and the message I get is Connection Problem or invalid MMI
Same thing happens with other codes as well. My provider is Family Mobile which uses T-Mobile network. Any ideas guys?
Some of the USSD codes don't work on Nougat. I had the problem that my screen's touch got inverted (edge kernel flashed on flat) so I had the re-calibrate my screen but the USSD code didn't work on nougat. So I had to flash a MM Touchwiz rom and from there it worked.
spirodave said:
I'm using The Global Elite ROM and I'm trying to calibrate battery using *#0228# and the message I get is Connection Problem or invalid MMI
Same thing happens with other codes as well. My provider is Family Mobile which uses T-Mobile network. Any ideas guys?
Click to expand...
Click to collapse
I have an sm-g920t and I solved my problem flashing right away after flashing the rom a csc of tmobile all that without booting into the rom for the first time. I hope it works for you
Sent from my SM-G955F using Tapatalk

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