S21 Ultra 1 week old, unable to turn on

[Don Don]

Tethering was on for appx 10mins and the phone suddenly got switched off, unable to turn on. Cannot detect battery charging either.. 

[dalebassett]

in previous samsung phones to fix this I'd usually hold power and volume up Button together 10 seconds until vibrates

[Don Don]

Thank you for the suggestion, doesn't work have tried various combi e.g power + up / power + down / power + up + down, neither works. I guess gonna visit repair centre tmr

[dalebassett]

don thats atrocious mate brand new phone like I just got the s21 ultra myself today hope I don't have issues but do find it gets really hot in general use

[Thekidman96]

I've had it since Tuesday, other then it getting got often, and battery being about below what I expected, it's had no problems so far. P.S I feel the battery is slightly getting better day by day as Samsung say about the phone learning your usage patterns, hopefully it does nearly as well as the Qualcomm