Connection problem or invalid MMI code - ##4636##

JAlcorn · ‎14-10-2023

Hi,

When I try to run the ##4636## code, I get 'Connection problem or invalid MMI code' msg. I've tried adding a command, restarting, safe mode, network and a new sim. Nothing works.

I have a samsung s22 ultra. Can anyone help?

Thanks

MI5 · ‎14-10-2023

@JAlcorn

Turn off wifi calling and make sure phone is limited to 3g.

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.

JAlcorn · ‎14-10-2023

Thanks, tried as suggested, still same error msg.

MI5 · ‎14-10-2023

Is it not *#*#4636#* anyway?

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.

pgn · ‎15-10-2023

*#*#4636#*#*

is the set of runes you seek.

Good luck, @JAlcorn.

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JAlcorn · ‎15-10-2023

Hi, tried that set of runes, don't get the USSD code running, but it tries to make a call.

Enlli · ‎15-10-2023

Don't know what phone but Samsung is notorious on this.

Wifi calling, it seems, has to be turned off at the networks end.

This is not O2 and we are all customers here similar to yourself and cannot answer account type queries.

O2

Connection problem or invalid MMI code - ##4636##

Re-enabling phone

Newbie trying to activate extra

eSIM Service Down Since Early Morning

Cannot make or recieve calls

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