Ask your mobile operator
2.go to hrs service
3. Turn on and turn off
<span>When you protect a workbook, you control the ability users have, to make changes to the file. This is t</span><span>o prevent other users from making changes, functions like adding, moving, deleting, or hiding worksheets, and renaming worksheets, you can </span>protect<span> it </span><span>with a password. </span>
