Hi All,
I was also very unhappy that trash all has been removed and I still am. I duly complain about it on the above reference link and can only encourage other iPhone users to do the same.
My problem was that I was trying to empty out my approx. 7000 emails. (did Apple really envision that it was smart to single mark 7000 emails and then hit the trash button?) However then I though about it and was wondering of some of the old technic to remove all emails from previous IOS versions was still working (pre Trash All IOS). So here it is.
1) Stand in the inbox you want to trash all in.
2) Select Edit
3) Tap the first email (now move can be selected)
4) Hold down the move button and unselect the email you just tapped
5) Release the move button
6) A new screen appear.
7) Select Trash in that screen
and now all the email in your inbox has been move to the trash folder. (my 7000 emails took approx. 8-10 min to move so be patient if you have many emails)
Problem solve. I knew I could count on Apple developers for creating a backdoor into this.
What I dont understand is why Apple did not allow a Trash All button to appear when you have selected all email. I could agreed that having a trash all button available when you first select Edit could be dangerous for the non savvy user but completed remove it is the wrong move and just take us all down to the least common denominator.