  Blind people face significant challenges when using smartphones. The focus on
improving non-visual mobile accessibility has been at the level of touchscreen
access. Our research investigates the challenges faced by blind people in their
everyday usage of mobile phones. In this paper, we present a set of studies
performed with the target population, novices and experts, using a variety of
methods, targeted at identifying and verifying challenges; and coping
mechanisms. Through a multiple methods approach we identify and validate
challenges locally with a diverse set of user expertise and devices, and at
scale through the analyses of the largest Android and iOS dedicate forums for
blind people. We contribute with a prioritized corpus of smartphone challenges
for blind people, and a discussion on a set of directions for future research
that tackle the open and often overlooked challenges.
