QUOTE(chiam8010 @ Feb 19 2021, 01:32 AM)
Some screen protector sharing here for s21 Ultra.
1. Tested with original basic plastic screen protector come with the new phone for a week. Then saw the youtube video about that plastic protector only support up to level 3 scratches. Then syarted to order screen protector.
2. Purchased TMax tempered glass and installed according to the video. Specially handle the fingerprint area according to video. User experience not so good. The FP cannot read if I just wash hand with soap or sanitizer, or sometime just hand too dry. I thought is weather making my finger dry bcoz if I apply abit lotion/water, whatever form of moisture, it can read the FP. Then after 1 week I thought of wanted to reapply the protector again(I got spare UV glue) but accidently drop the protector on floor from table height after removed from phone. It cracked.
3. Without having any choice, I experienced the screen without any protector for 1 week until today. The FP super duple great experience, never have such condition as dry finger that can't read the FP. Just a gently touch without any pressure, 100% detected. Really like the way it unlocked, fast and precise! But the drawback is the naked screen easy to coat with fingerprint grease and dust. Make the screen always feel dirty. Of coz also high risk without protection.
3. Then my mocolo brand tempered glass arrived today. Installed with special handling on FP area too. It work for my S10+ but not on S21 ultra which I apply both phone with same method today itself. My S21 Ultra totally not able to register the FP with this screen protector. Checked again the mocolo glass, it is significant thicker compare to Tmax glass. End up I removed it again.
Now still searching which tempered glass to go for. Whitestone Dome is overly expensive which not in my consideration at all. Being using it on Note8 last time. It is good but too expensive.
Your Tmax experience same with me

the FP so fussy when using Tmax, and then due to some bad luck failed second try install haha.
Yes definitely agree that without any sp the FP sensor works extremely well, light touch is enough and unlocks in less than a sec. Much more responsive compared to my s20u even though I used the s20u without sp also.
I think you can try again tmax and see if it works better 2nd time round. Advise I got from seller is 1) the coin trick 2) allow the glue to evenly spread ~ let it spread for 10mins before using UV light.