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Fix networking problem in Korean version of S3

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USSD code running, and then shows a message Undefined additional service. Contact customer center?

USSD not active, and then shows a message Undefined additional service. Contact customer center.

Before you contact your carrier for assistance, try the tricks below.

  1. 1
    Press the home button.
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  2. 2
    Tap on "Apps".
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  3. 3
    Tap on "Settings"
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  4. 4
    Tap on "Location and Security".
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  5. 5
    Disable "Mobile tracker".
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  6. 6
    In "Settings" > "Application manager", uninstall or disable Blacklist Call or similar applications (Calls Blacklist, Call Blocker).
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  7. 7
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  8. 8
    If nothing helps, then contact your carrier as advised in the error message.
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What procedure should I follow if my phone is Samsung note 5?

It shows "Undefine additional services.Contact customer center.",what procedure should follow because the producers given step 5 and 6 are available in Samsung note 5. My situation more less the same like other users by the procedure given cannot be applied to Samsung note 5. I have tried: I have tried to apply the procedure given for S4 with no success and also restarting the several times. I think it was caused by: A certain software in my phone is missing because even if I change the SIM card the problem is still the same

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My mobile is ussd code was undefined aditional please help me?

Please help me find a solution I very worried for my mobile

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Fix networking problem in Korean version of S3

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Article Info

Categories : Samsung Galaxy

Recent edits by: Gloire, Maria Quinney, DeleteQnA

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