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How to fix connection problem or invalid MMI code on the Huawei Ascend Y 300?




My phone is disply invalid MMI code?what is solustion?


Hi I need help with my SANSUI LIFE PAD
Every time when I"m checkig my airtime balance, it says invalid USSD or MMI code , what should I do ?


I am getting a message saying MMI code on my Huawei Y300. please help


installed ussd mmi fix but again code invalid MMI code


Hey there! I found this free app on Google Play named USSD/MMI Fix. I would try this if I were you.

Link: click here

Please let us know if it works for you. Good luck!



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