MMI/USSD codes do not work.

[Galaxy_user_eu]

When I try the MMI/USSD codes by calling *#06# or *#9900# I'm getting unknown application error or connection error. 

I tried it on another device and its just working fine.

Yet another problem related to network settings and device information.... Unbelievable.

[Galaxy_user_eu]

https://r2.community.samsung.com/t5/Galaxy-M/Use-of-code-9900/td-p/8813975

Topic above shows what I'm trying todo aswell.

I cannot even debug this phone because of this, cannot enter recovery menu, cant change APN settings, 2 times I've send this phone in for repair.

What a joke.

[Galaxy_user_eu]

My unsolved topic about APN Settings

https://eu.community.samsung.com/t5/overige-smartphones/s21-fe-reset-apn-settings/td-p/11064595?src=...

My unsolved topic about being bount to VoLTE Calling and no internet acces while being on a call

https://eu.community.samsung.com/t5/overige-smartphones/s21-fe-wi-fi-calling-and-volte/td-p/10660603...

My sort of solved topic about NOT having the option to toggle VoLTE Calling.

https://eu.community.samsung.com/t5/overige-galaxy-s-series/s21-fe-volte-calling-how-to-turn-off/td-...

And the unsolved cherry ontop of the pie. Not able to acces recovery menu to perform a full wipe.

https://eu.community.samsung.com/t5/overige-galaxy-s-series/can-t-acces-recovery-menu-s21-fe/td-p/97...

[Galaxy_user_eu]

And I'm also lost on how to obtain a PUK2 code for my FDN Settings. Apparently my mobile carrier cannot provide me a PUK2 because they only provide a PIN1 and PUK1 for the simcard and have no clue what the useage of PUK2 is.

Very strange.