S21 No 4G or 5G connection anymore

[motokill35]

Since the latest update the phone will no not connect higher that H+ .cleared cache rest net work .put sim into work S23 and 4G straight away.

Any idea's 

[Piper123]

Hey there and welcome to the Samsung UK Community Forum

Please go to Settings and Reset Mobile Network Settings. This should resolve your issue.

[motokill35]

Hi yes I've tried that already. Made no difference.

[motokill35]

Tested sim card in another phone and no issue So it's definitely this phone .

[BandOfBrothers]

If running the diagnostic tool found in your Samsung Members App does not highlight anything, then can you insert another Networks sim card to test the phone. 

Ultimately, if a factory reset does not help, then a Samsung Service Centre maybe the next step @motokill35