Connection problem or invalid MMI code

[Bishal85]

I'm using Galaxy F14 5g .

From several weeks I'm facing weired problem. 

While I'm entering USSD codes like *#0*# or *#06# or *#07# , always shows that 'connection problem or invalid MMI code '

Please tell me why it is occurred and what is the solution? 

I'm very worried about it .

[99Case]

The auto blocker must be on under security settings. Disable the same and it should work post restart.

[Bishal85]

Thank you so much , it working .

[jakaria53]

I have tried this setting many times but my problem is not solved

[99Case]

No worries. Happy to help..

[cs_member10]

Dear Samsung Member,

Greetings from Samsung Customer Support!

As per your concern, we want to inform you that kindly turn off the Auto Blocker by the given steps, if the codes not working

Settings > Security and privacy > Turn off Auto Blocker.

Warm Regards,
Samsung Customer Support

[Bishal85]

Very very Thanks . It's working

[jakaria53]

I have tried this setting many times but my problem is not solved