CONNECTION ERROR OR INVALID MMI CODE

[meg1953]

Hey y'all

Has anyone come across this error message?

I installed a new SIM a week ago and the message is coming at me every 30 seconds....arhhhh.

I have had the new sim in 2 different Samsung models and exactly the same message appears on both phones.

Google says this is a common problem easily resolved (ha)....I have tried several of the suggested fixes....Restarting, Shut down, Reset network, Clear Cache , Soft Reset,.

The next fixes are to Modify Prefix (put a comma in front of the Prefix) or Activate radio turning on IMS over SMS.. .. I have no idea where to start with those.

I have spoken with 'Technicians '...that have just wasted my time.

Can anyone help?

Cheers

[Neo001]

Hi,

Try the options listed here - 

https://www.alphr.com/how-to-fix-connection-problem-or-invalid-mmi-code-on-samsung-device/#:~:text=R....

[keith30]

Buy another sim as that one sounds like it's faulty if you tried it in other phones with the same message appearing.