“Connection problem or invalid MMI code” on Android phone


We have got a new cell phone operator at work and one of their features is that if you prefix a number with the code *150# the call will be charged to a separate bill that will be sent to the employee and not to the employer. This is quite common in Sweden and is of course a good thing, but it doesn’t work on Android (pre 2.1). I use an HTC Tattoo and get this message when calling for example *150#0123456789:

Connection problem or invalid MMI code

In the thread I linked to above, there is a workaround: put a plus sign (+) before the first digit, like so: *+150#0123456789. This gets rid of the error message and allows the call to go through. The number that is called according to the phone has no plus in it: *150#0123456789

Let’s hope this works. Otherwise I might get a call from my boss later on :)

Update:
I mailed Ventelo’s (the operator) support and received this positive answer (translated by me):

Yes, using *+150# will work as well.

Good news, in other words!

Update 2:
Here are some tips from the comments:

By me:
Hi everyone, looking for general help about MMI codes. I must admit that I do not know much about this more than what I have described in my post. If my solution doesn’t work out for you (and I suspect it doesn’t, as you have different problems), you’ll have to try to find an answer elsewhere, perhaps here: http://answers.yahoo.com/dir/index?sid=396545653

By Phoenics:
Hello, try calling your network carrier… they will give you a series of troubleshooting steps like some codes. Just provide them the serial no. of your phone (dial *#06# to get it from your phone)…

used to be a customer service representative and i have encountered concerns like this. :)

By Ismael:
Check this. It seems this the solution for your problems http://forum.xda-developers.com/showthread.php?t=1478608

just add an comma (,) at the end of the code.

for example,
if your code is *123*1#
then you should dial it as *123*1#,

By sam winston:
hai everyone.. this is a best solution from USSD code error… There are two ways
1 st one: Reboot your mobile ( if you have lot of time to wait)
2 nd one: Just turn on the Airplane mode for 30 second then turn off the Airplane mode( if you are in a urgent situation)..

The above two ways will help to get the balance reply using USSD code dialing in your android.

If you want more information aboutt this contact me Ph no : –redacted–

By Mohamed:
Hi Guys,
my phone is sky vega
i have came across the problem of not being able to execute the basic detail commands provided by the operators to check the details.

however i had the same problem and this is what worked for me

just add an comma (,) at the end of the code.

for example,
if your code is *123*1#
then you should dial it as *123*1#,

this way i think it blocks the rest of the codes going with it and works properly

this worked for me check for yours

If it helps please say “thanks”

90 thoughts on ““Connection problem or invalid MMI code” on Android phone

  1. “Connection problem or invalid MMI code” on Android phone means:-
    suppose you are asked to fill in *#*#4636#*#* (star hash star hash 4643 hash star hash star).

    But you types ##4636## i.e. interpreting star as inverted comma. Thus, there is no such command like :- ##4636##

    1. hi “Connection problem or invalid MMI code” on Android phone means” how to rectify & canclled this mmi code in htc wild fire

      1. hi, went i request balance of my account it always reply me as a ‘ Connection problem or MMI Code’ on Android phone and also USSD code running . How i can solve this problem

        1. I request balance of my new android phone it reply connection problem and MMI CODE.How can I solve this problem.

        2. hi “Connection problem or invalid MMI code” on Android phone means” how to rectify & cancelled this MMI code — pls tell me

      2. hi “Connection problem or invalid MMI code” on Android phone means” how to rectify & canclled this mmi code in htc wild fire
        SAME ERROR !

        HOW I SOLVE IT PLEASE GIVE ME A SUGGESSION
        MY PHON NO.9825684766

      3. I AM HAVING THE SAME PROBLEM. I DO I RECTIFY THIS PROBLEM. I CANNOT MAKE ANY OUTGONG CALLS. AS WELL.

    2. hi, went i request balance of my account it always reply me as a ‘ Connection problem or MMI Code’ on Android phone and also USSD code running . How i can solve this problem

  2. i want to check the balance in my phone by typing #124# and send as usual , but it does not work and appear the message ‘connection problem or mmi code’. what should i do? the problem is that it never has any problems before with this system. thanks.

  3. wen i make a call,i get e same error and this idea is not working for me.please help,i can not receive or make calls. am in South Africa and am using a cell c network

    1. I’m also in South Africa and having the same problem when i try to use my cell c data network sim 2, G2. I can make & receive calls on sim 1 mtn cell 2G / 3G. Heeeeelp.

  4. Hi @seyha and @Mannase!

    I am really no expert in this area and can not answer your questions, sorry. But maybe someone else who has found his or her way here knows how to solve these issues?

  5. Hi, when i call to any no. it doesnot work. and when i call *141# , it says connection problem or invalid MMI no. plz tell what should i do??

  6. Hi, got the solution remove the apps thats not working or recentely installed, like fx camera, some kind of add on apps for phone, than u would able 2 have msg back on ur screen

  7. Can someone help me,i bought a Phone pc but the imei number is 0 and i have problem with MMI ans SMSC numbers please help i can not make calls from MTN network.

  8. iam facing the same problem…”connection problem invalid mmi code..and iam also not able to make call” i dont know the exact reason for it..but i think it may be due to some application which you installed..just do restore factory setting after that restart your phone once..it will fix this issue..

  9. Hi,

    I just got my Tabulus – Android 2.2 Tablet Phone with 7 Inch Touch (Quad-band GSM, WiFi,Camera)I check it keeps saying, “Connection problem or invalid MMI Code.”. I am unable to send or receive calls and text messages. When calling, it beeps once and hangs up and when someone tries to call me it redirects to voice mail.

    Help?

    Thanks,
    Neeraj

    1. Hello, try calling your network carrier… they will give you a series of troubleshooting steps like some codes. Just provide them the serial no. of your phone (dial *#06# to get it from your phone)…

      used to be a customer service representative and i have encountered concerns like this. :)

  10. hi. can someone please tell me what a mmi code is please because i have no idea and my phone keeps freezing up and not letting do anything until i have type it in?? many thanks if someone trys too help me :)

  11. I am using HTC Wild fireS hand set i have MMI code problem in my set. how to rectify that pls give the reply.

    I have Qtel sim card conection i am using mobile internet option. and while i cheak the balance MB the question came
    MMI code error.

  12. When I m checking my balance knit code and connection prob. Errors in this pls let me no the solution I m using del streak *141#

  13. i have problem with my xperia x10, after update version, the phone can’t call, receive call, sms and etc…. it come out connection problem or MMI code not valid … How to solve it? location here is malaysia, sarawak, kuching.

  14. I have a Samsung Galaxy S3, it is on vodacom business contract. I am unable to view my airtime balance, I have tried adding a comma at the end as well as a plus sign after the ‘*’. Please can you help me.

  15. My phone (Samsung GT7500) doesn’t work properly with MMI Code.
    If I access my account via MMI code, the system wont recognise my password, with other phones, it works perfect.
    Roya, Tanzania

  16. Hi i am a Nigerian. I just bought an android wm8650 which i have put my sim. I am trying to check my airtime or even recharge but its showing me thisn code “connection problem or invalid MMI code”. To check my airtime, i normally use #124#. Please how can i do to remove this error and enjoy my android.

  17. Am using samsung galaxy y pro when I try to check balance it write conection problem mmi code error. Is there any solution ? Urgent help

  18. when i noticed that problem,ijust switched off the phone(lg~e405) and then on.ihave not seen the problem again. i hope it will be over.

  19. Which application i instal in my mobile
    When i am calling someone cannot see my number
    .they show private number .plz reply bro

  20. sir…
    I have purchased 1 month old samsung galaxy s2 it is creating three errors.. 1st one is “INVALID MMI CODE” …2nd one is wn i m diverting my call it is notifying that “not supported by network” ….3rd one is that-internet connection is not working continue…
    please any one help me…..I m in very tentioned….please…..

    1. My phone is sony xperia miro i bought it last week when i want to check balance *123# it will coming “connection problem or invalid MMI code” plz help me i am in tension please

  21. i have motorolla droid 2 global and from when i buy this till today i could not check my balance by dialling *212#
    its a very difficult problem for me

    please if u know something about this mmi code please please tell all of motorolla android phone users

  22. wamt make transaction on my android phone but but its says “MMI cord error or invailed”
    what does this mean?
    can it be solved?

  23. hi

    i am using samsung duos mobile, while going to the balance enquiry the error message like connection problem and invaild mmi code

    what i have to do..

  24. Hi, i’ve updated my dell streak 5 from android 2.2.2 to android 2.3.3 and since,when i type *124# to check my balance it writes ”connection error or invalid MMI vode” Help please

  25. i want to check the balance in my phone by typing *130# and send as usual , but it does not work and appear the message ‘connection problem or mmi code’. what should i do? the problem is that it never has any problems before with this system. thanks.

  26. Dear I am using Samsung S 3 , When i want to check the balance the message is coming wrong MMI code or not registered to network , I make factory reset but the problem remain the same , can you help me .

  27. Hi, when i call to any no. it doesnot work. and when i call *141# , it says connection problem or invalid MMI no. plz tell what should i do??

  28. i am using samsung galaxy dous phone and videocon sim. and i have a problum. i am not chek my balance. i dial *124# for check my balance it shows ussd code running and then a diolog box appears it shows connection problem or invalid mmi code. it does not show my balance.please solve my problum.

  29. My PC tablet is Allwinner A13. I have problem with MMI code, please help me to solve this problem. I am in Indonesia.

  30. hai everyone.. this is a best solution from USSD code error… There are two ways
    1 st one: Reboot your mobile ( if you have lot of time to wait)
    2 nd one: Just turn on the Airplane mode for 30 second then turn off the Airplane mode( if you are in a urgent situation)..

    The above two ways will help to get the balance reply using USSD code dialing in your android.

    If you want more information aboutt this contact me Ph no : –redacted–

  31. when i try to check the balance in my phone by typing *556# and send as usual , but it does not work and appear the message ‘connection problem or mmi code’. and also i cant make or receive calls whit the phone. what should i do?. thanks.

    1. I have a problem with htc phone saying that my etisalat sim card are not allowed a connection to the mobile network. Please help me with secert code. My number here 2348172666905 send me sms.

  32. Hi my name is jake, am having issues whit my phone i cant make or receive calls whit it and also cant check my balance when i checking it whit *556#, it comes up showing conection broblem or invalid mmi code. please help me rectify these problem thank.

  33. Am using samsung galaxy S4 mini when I try to check balance it write connection problem mmi code error. Is there any solution ? Urgent help

  34. Hi Guys,
    my phone is sky vega
    i have came across the problem of not being able to execute the basic detail commands provided by the operators to check the details.

    however i had the same problem and this is what worked for me

    just add an comma (,) at the end of the code.

    for example,
    if your code is *123*1#
    then you should dial it as *123*1#,

    this way i think it blocks the rest of the codes going with it and works properly

    this worked for me check for yours

    If it helps please say “thanks”

    Regards,

    1. I AM HAVING THE SAME PROBLEM. I DO I RECTIFY THIS PROBLEM. I CANNOT MAKE ANY OUTGONG CALLS. AS WELL.

  35. I just bought Tecno R7 and am finding it difficult to load recharged card on the networks i am using. it kept on saying mmi error. please how could this be resolved soonest.

  36. I have ASUS ME372CG TAB. I am having the problem of “Connection problem or invalid MMI code” I have tried most of the above methods, but non worked. Can anyone help me for solving the issue.

  37. hi guys my phone is an lg verizon vs930 with “Connection problem or invalid MMI code” some help please

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