Firstly the online tutorial videos need to be slowed down so you can watch at the same time as doing... Secondly the products dont behave the way the tutorial shows when trying to apply. The S21 Ultra front screen protector when trying to do the first section just slid across the phone resulting in it being stuck at an angle and not where originally placed. Tried to undo and reapply twice before the final attempt was discarded... The S21 Ultra rear camera protector was pointless and didn't stick and didn't match up to the tutorial videos online, so both just came off... So if you are a Samsung S21 Ultra user, avoid this product at all cost. Not impressed.