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Original topic:

So many things wrong with my S21U - I'm trying a replacement

(Topic created on: 09-03-2021 04:57 PM)
spitshaw
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Galaxy S21 Series

So I've had my S21U for 3 and a half weeks and I've been totally unable to get it to act like a supposedly 'best ever Android' £1200 flagship phone.

These are the issues I've encountered:

- It's overheated on me four times, once while using the camera and the other three times during skype calls. I don't understand how regular useage can cause it to overheat so easily. I've never had a phone overheat on me in my life before

- I've not been able to get more than 5.5 to 6.5 hours max screen on time. And this is with dark mode enabled, wifi only, brightness under 20%, all apps in sleep or deep sleep mode. I even removed Facebook and Chrome as they were hogging a lot of battery and still no improvement. I have no idea how so many others are getting 9-10 hours SOT. I've only been using it for light useage such as browsing reddit, reading a couple of messageboards with the odd 30minute skype call or a couple of youtube videos thrown in.

- There was three times when I accidentally let the battery drain and each time I couldn't get the phone to charge or turn back on/show anything on screen. I'd wake up in the morning after putting it on charge to find it still dead with no signs of life. It then wouldn't register as charging. I had to faff around for like 15 minutes, changing outlets/chargers a few times and repeatedly trying to turn it on/force restart it to get it working. Just all round odd behaviour.

- Also the colour calibration on vivid mode seems to be really weird. Skin tones are pale, yellow and washed out. There's also a weird software thing happening when vivid mode is turned on. For example, an image in reddit looks totally different in colours/saturation than the exact same image opened in Chrome or Facebook. The colours would also visibly change when apps are fullscreened from being in splitscreen mode or from the recent apps tray.

My 4.5 year old Huawei P20 Pro has been through the wars, yet was still in a much better working condition (it was still getting 9 hours SOT!). I'm kinda annoyed I traded that in now. I'm hoping this s21u was just a defective unit and a new one will be better. I've definitely been incredibly disappointed so far.

Any one else had a similar experience?

33 REPLIES 33
spitshaw
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Galaxy S21 Series
256gb Exynos. My phone is almost always warm while in use too, even just on social media or reddit. I'm not sure if that's normal
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spitshaw
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Galaxy S21 Series
Thank you! How much screen on time are you getting on your device?
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spitshaw
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Galaxy S21 Series
That sucks. The replacement still had bad battery?
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tinglish
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Galaxy S21 Series
I have the exynos 128gb version.
I get anywhere between 9-11 SOT with 120hz and wqhd.
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spitshaw
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Galaxy S21 Series
I would be over the moon with that! I wonder why my battery is only like 40-50% as good as yours.
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tinglish
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Galaxy S21 Series
have you tried these possible solutions:

1) partition cache wipe after every update.

2)turn off nearby scanning and printer scanning.

3) change mobile network to 4g from 5g(if you don't have 5g in your area)

4)put apps you don't use in deep sleep

5)use Samsung browser instead of chrome

6)set up auto restarts at least once a week (I do twice a week)

there are some other ideas,I just can't remember them😅
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spitshaw
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Galaxy S21 Series
done them all besides the partition cache wipe. I've just gone to do that and after turning the phone off its doing that thing again where I can't get it to turn back on. I can't get it into recovery mode either.
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tinglish
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Galaxy S21 Series
you have to plug your phone into laptop or computer to get it to go onto reboot menu(press volume up and power button).

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spitshaw
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Galaxy S21 Series
yeah I know, it just keeps momentarily bricking whenever it's turned off. it won't turn on at all or even register that it's charging right now
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tinglish
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Galaxy S21 Series
I would say you definitely have a faulty device then.
sorry I can't be any help 😔
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