1. Double tap on the text to copy. Drag the handles until the entire text is selected. Tap 'Copy'.
2. If you tap once in the space, only 'Paste' does NOT appear.
3. So double tap the space! A keyboard appears with the input box just above!
4. Start typing. The text appears in the cell and in the bar above the key board. Tap 'Paste' in that bar to paste in the cell!
Note: You need to tap the bar above the keyboard once for the 'Paste' to appear!