Most manufacturers of Android devices often provide replacement user guides for Android tablets. Many Android makers, such as Lenovo, Samsung and Google, have user manuals for their recent devices. Most users are required to know the model and serial number of the tablet to find the correct user's manual.
Some may find manuals of lesser popular Android tablets on manual repository sites such as ManualsLib and ManualsOnline. As with many manufacturer sites, the manuals are free for download and online viewing. Public domain sites such as Archive.org and forum sites provide free manuals when requested by users in the online community.