Look at a Samsung S20 Ultra or a Note 20 Ultra if you want that form factor.
The S20 ultra has better specs and is a overall better phone then the S21 Ultra. That and you can find much better prices for the phone. Try and find pristine condition or phones listed as new on ebay or swappa.
I had to manually check and it downloaded right away.
Just check for software updates and click everything
I just gifted my Mom a prestine condition Note 20 yesterday as a early Christmas gift. A nice upgrade from her old S9.
I think she definitely likes the stylus and is checking out all the features. She’s just having getting used to a new phone gripes and for some reason her old phone isn’t letting her transfer her data over.
Look at the spec differences, software and performance of the two phones between their price points.
The only thing the S21 offers an improvement on is a .2 extra in clock speeds, slightly smaller screen for a 4DPI increase and a stylus. It released at a cheaper price at release, but currently a S20 Ultra is cheaper by $100 in comparison because it’s a year older phone.