update

[DottyS]

Since last update keeps saying no Sim card or no sd or not on registered network - happened after last one too but fixed itself after about a week or so - is this happening to anyone else? (Both me and other halfs phones different samsung models) 

[BandOfBrothers]

That's not happening after the August update on my N10+ 5G or N20 Ultra @DottyS 

As a process of elimination can you try your sim card in another phone and another sim card in your phone  ?

Also try clearing the system files cache of the phone by turning it Off and then from a set series of button presses go into the phone's system files and clear the cache. No info is lost this way.

If no help then back up and remove any relevant Sd card and factory reset as a last resort.

A Samsung Experience Store or Samsung Service Centre can help.