USSD & MMI: Nützliche Service-Codes fürs Handy
Call waiting Connection problem or invalid MMI code | Xiaomi European Community | MIUI ROM Since 2010
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Što učiniti ako na Androidu piše "Nevažeći MMI kôd"
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How to fix connection problem or Invalid MMI code android phone
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Using dial code *#7465625# is your carrier-branded phone SIM Locked? | Page 2 | Android Forums
