  Bell tests---the experimental demonstration of a Bell inequality
violation---are central to understanding the foundations of quantum mechanics,
underpin quantum technologies, and are a powerful diagnostic tool for
technological developments in these areas. To date, Bell tests have relied on
careful calibration of the measurement devices and alignment of a shared
reference frame between the two parties---both technically demanding tasks in
general. Surprisingly, we show that neither of these operations are necessary,
violating Bell inequalities with near certainty with (i) unaligned, but
calibrated, measurement devices, and (ii) uncalibrated and unaligned devices.
We demonstrate generic quantum nonlocality with randomly chosen local
measurements on a singlet state of two photons implemented with reconfigurable
integrated optical waveguide circuits based on voltage-controlled phase
shifters. The observed results demonstrate the robustness of our schemes to
imperfections and statistical noise. This new approach is likely to have
important applications in both fundamental science and in quantum technologies,
including device independent quantum key distribution.
