My phone keeps telling me there's no internet connection/ invalid MMI code

[luhle]

When i try to check my balance or please call someone

 Any suggestions on how to fix this problem 

[faizu13_14]

Your internal storage was full so you can dellet some thing. And if they not work so u can rest your wifi data ,and if they not work so u can restart your mobile not reset , I hope they work ❤

[Muhammed8571]

Your internal storage was full so you can dellet some thing. And if they not work so u can rest your wifi data ,and if they not work so u can restart your mobile not reset , I hope they work ❤ I was fasttime new lenar