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Original topic:

MMI code error

(Topic created on: 07-29-2025 07:32 AM)
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Nyl_09
Beginner Level 2
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Galaxy A
I would like to check my balance using the code *123# or even the service provider's own app where I can check my sim balance but the MMI code error always comes up. 
Are you experiencing the same thing and what was the solution? 
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Galaxy A

Same problem im using my a55 and cant register to any tnt promos but when i transfer my sim to other device, it works so maybe my phone or settings has to do with it

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