Mobile devices have been able to access the web since 1998, but
today, there is a high level of expectation that a phone should
provide an internet experience.
BS 8878 requires you to discuss how you will support mobile
devices and in your product accessibility statement you will need
to declare a level of support.
Guidance for developing products for mobile devices is sparse,
so developers primarily need to consider developing web products to
WCAG 2.0 which should at least ensure that the principles of
accessibility are in place. BS 8878 also draws attention to a few
other documents specific to the mobile web:
Note that because guidance on mobile accessibility is newer and
less robust, user-testing becomes more important to developers who
want to make sure that their products are accessible on mobile