What's the difference between USSD, MMI and SS codes?

What's the difference between USSD, MMI and SS codes?

Service mode code Samsung android 4.4 Lte band

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Answers (1)

Answer 1
November, 2020
Every code that you enter over your phones keypad that contains asterisk (*) or hash (#) characters is an MMI code. MMI stands for Man-Machine-Interface. Even though most of these MMI codes look pretty similar, they fall into different groups with completely different actions.

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