Samsung Galaxy S USSD Code Running Problem - solved

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1) There is known bug/problem in Galaxy S with eclair 2.1 that USSD code stops working after some time in . I faced this problem for many days and was unable to use some GSM services like balance checking etc. I did not find any solution for it on internet.

Luckily, I was able to pin point the cause which was creating the USSD problem and just want it to share so that your time can be saved.

I observed the mobile tracker is causing the problem. As soon as I turn it off USSD works fine. When the mobile tracker is On then USSD is screwed up again. I am sure there may be other apps which can cause similar problems ... please share if u find any...And of course all galaxy S users..please confirm if the mobile tracker is casing issue in your phones as well??


2) Edit Update - For those who find "Mobile Tracker" is not the root cause --

Backup your important data.

You have to do a clean install / Factory RESET once again... try to isolate the problem causing app by installing the apps one by one and checking the USSD code functioning...for me it was mobile tracker on galaxy s Android 2.1 .....

I know this is quite tiresome work when you want lots many apps on your device...
But then you have to make a choice.

3) USSD code error when i do a speed dial..
Please hold speed dial digit for few seconds instead of using # then number OR number then call...

I have the same issue and I really don't know what's causing it. However when I put the SIM from an older contract (same carrier) USSD codes work.

However with the sim/contract I got the phone with, I get the following error "You don't have access to this service".

Might be related to the fact that the contract isn't fully activated or something like this

USSD Balance Check Problem Solved / Solution.

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Samsung Galaxy S I9000 USSD command output problem solved, thanks to Ravi4Chahal.
Problem:
when i run my balance checking command *124# the USSD command executes but no output displayed,
Solution:
I disabled the mobile tracker in Settings -> Location and Security -> Mobile Tacker -> Disable

I too had a similar problem that I was only able to solve disabling Mobile tracker.

Does anybody know of a way that we can keep the mobile tracker on?

Its really a great tool in case your phone gets stolen

Thanks a lot,
I have samsung i5801 i just switched off the mobile tracker, now i can check the balance and also it shows the balance after the call is ended.

But the mobile tracker is a good utility wat should i do make both work properly.

thanks ravi4chahal, i'm able to run ussd codes now.
but still, i'm not getting "last call charge" message
Vodafone India

I recently upgraded to leaked Froyo 2.2 XXJPH, it seems USSD problem is resolved in this version. USSD code running fine along with mobile tracker at the same time.

Cheers!

Thanks Ravi! I was also facing the same problem but wasnt able to figure as to what was causing the problem. Now I can atleast check my balance by disabling the Tracker temperorily.

Samsung Galaxy S: Mobile Tracker is the problem indeed! I was wondering why I couldn't check my balance any longer... Thx!

Since Froyo seems to fix the issue, all we have to do is wait

USSD Code in Galaxy S

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Indeed Tracker is the key problem to run USSD code in Galaxy S. Hope Froyo will solve the problem soon.