If money is your concern, then just keep your Note 20 Ultra. I have trade in my Note 20 Ultra with S21 Ultra due to same issues like you. But after 3 days of usage I feel only slight improvement on the performance. The 4G signal strenght no improvemnet at all. Hopefully no drop call problems like Note 20 Ultra last time due to poor 4G signal strength on Exynos 990 last time. Still 3 days of usage so I cannot make any conclusion yet.

damn sien after so many generations, exynos signal strength still so lousy, i cant believe this is a flagship, how to buy like this

Hi Bro/Sis
Just clarify.
SOT 1 hour 46 m. Battery 100 drop to 70 ( Majority in WhatsApp ).
Is that consider good endurance ? (S21U)

What you do within whatsapp for 1hour??

When and what model did you order?

For the first time ever, I received a preorder from Samsung way ahead of it's advertised date. The S21 was stated to ship on the 5th of Feb and I got it on the 29th.

Just whatsapp/replying message using data. Let me try again tomorrow and share the screen capture.

anyone share what case are you guys using?

me still use plastic silicon cuz not many choices

Alright.

My experience. The battery  life is excellent.

When and what model did you order?

For the first time ever, I received a preorder from Samsung way ahead of it's advertised date. The S21 was stated to ship on the 5th of Feb and I got it on the 29th.

They never update their website, just send the phone directly via DHL. you will get an SMS before delivery. That's it.

Same la, mine stated shipping date is 5 Feb, ordered on 23 January, still nothing yet too... haha. wanna call and ask also it's still before the shipping date, so no ground there

Im using ringke fusion.  Tpu clear case

Oh my, you ordered since 23rd, on which model?

Me too. But after few days not liking the tactile feel. Esp if your hands a bit oily. Next case I'll get a case with some texture, or those softer silicone instead of super smooth like this one.

Ever since I got the phone, it keeps using data on my SIM 2 (prepaid)! Even though Mobile Data is only switched on for SIM 1 (my primary postpaid). Anyone had same issue? You guys better check too. Never had this issue on prev Huawei phone.

If don want sim card use data, set 2G only
Sometime 4G will run some data even you never on mobile data

just did a comparison on s21+ speakers vs s9/s10+/s20 ultra...surprised surprised hehe